21921220.000000000

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:237

約数の個数: 288

約数和(自身を含む): 908107200

約数和(自身を除く): 653236740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 17, 18, 20, 26, 30, 34, 36, 39, 43, 45, 51, 52, 60, 65, 68, 78, 85, 86, 90, 102, 117, 129, 130, 149, 153, 156, 170, 172, 180, 195, 204, 215, 221, 234, 255, 258, 260, 298, 306, 340, 387, 390, 430, 442, 447, 468, 510, 516, 559, 585, 596, 612, 645, 663, 731, 745, 765, 774, 780, 860, 884, 894, 1020, 1105, 1118, 1170, 1290, 1326, 1341, 1462, 1490, 1530, 1548, 1677, 1788, 1935, 1937, 1989, 2193, 2210, 2235, 2236, 2340, 2533, 2580, 2652, 2682, 2795, 2924, 2980, 3060, 3315, 3354, 3655, 3870, 3874, 3978, 4386, 4420, 4470, 5031, 5066, 5364, 5590, 5811, 6407, 6579, 6630, 6705, 6708, 7310, 7599, 7740, 7748, 7956, 8385, 8772, 8940, 9503, 9685, 9945, 10062, 10132, 10965, 11180, 11622, 12665, 12814, 13158, 13260, 13410, 14620, 15198, 16770, 17433, 19006, 19221, 19370, 19890, 20124, 21930, 22797, 23244, 25155, 25330, 25628, 26316, 26820, 28509, 29055, 30396, 32035, 32895, 32929, 33540, 34866, 37995, 38012, 38442, 38740, 39780, 43860, 45594, 47515, 50310, 50660, 57018, 57663, 58110, 64070, 65790, 65858, 69732, 75990, 76884, 83291, 85527, 87165, 91188, 95030, 96105, 98787, 100620, 108919, 113985, 114036, 115326, 116220, 128140, 131580, 131716, 142545, 151980, 164645, 166582, 171054, 174330, 190060, 192210, 197574, 217838, 227970, 230652, 249873, 285090, 288315, 296361, 326757, 329290, 333164, 342108, 348660, 384420, 395148, 416455, 427635, 435676, 455940, 493935, 499746, 544595, 570180, 576630, 592722, 653514, 658580, 749619, 832910, 855270, 980271, 987870, 999492, 1089190, 1153260, 1185444, 1249365, 1307028, 1415947, 1481805, 1499238, 1633785, 1665820, 1710540, 1960542, 1975740, 2178380, 2498730, 2831894, 2963610, 2998476, 3267570, 3748095, 3921084, 4247841, 4901355, 4997460, 5663788, 5927220, 6535140, 7079735, 7496190, 8495682, 9802710, 12743523, 14159470, 14992380, 16991364, 19605420, 21239205, 25487046, 28318940, 42478410, 50974092, 63717615, 84956820, 127435230, 254870460]

約数ペア:

[(1, 254870460), (2, 127435230), (3, 84956820), (4, 63717615), (5, 50974092), (6, 42478410), (9, 28318940), (10, 25487046), (12, 21239205), (13, 19605420), (15, 16991364), (17, 14992380), (18, 14159470), (20, 12743523), (26, 9802710), (30, 8495682), (34, 7496190), (36, 7079735), (39, 6535140), (43, 5927220), (45, 5663788), (51, 4997460), (52, 4901355), (60, 4247841), (65, 3921084), (68, 3748095), (78, 3267570), (85, 2998476), (86, 2963610), (90, 2831894), (102, 2498730), (117, 2178380), (129, 1975740), (130, 1960542), (149, 1710540), (153, 1665820), (156, 1633785), (170, 1499238), (172, 1481805), (180, 1415947), (195, 1307028), (204, 1249365), (215, 1185444), (221, 1153260), (234, 1089190), (255, 999492), (258, 987870), (260, 980271), (298, 855270), (306, 832910), (340, 749619), (387, 658580), (390, 653514), (430, 592722), (442, 576630), (447, 570180), (468, 544595), (510, 499746), (516, 493935), (559, 455940), (585, 435676), (596, 427635), (612, 416455), (645, 395148), (663, 384420), (731, 348660), (745, 342108), (765, 333164), (774, 329290), (780, 326757), (860, 296361), (884, 288315), (894, 285090), (1020, 249873), (1105, 230652), (1118, 227970), (1170, 217838), (1290, 197574), (1326, 192210), (1341, 190060), (1462, 174330), (1490, 171054), (1530, 166582), (1548, 164645), (1677, 151980), (1788, 142545), (1935, 131716), (1937, 131580), (1989, 128140), (2193, 116220), (2210, 115326), (2235, 114036), (2236, 113985), (2340, 108919), (2533, 100620), (2580, 98787), (2652, 96105), (2682, 95030), (2795, 91188), (2924, 87165), (2980, 85527), (3060, 83291), (3315, 76884), (3354, 75990), (3655, 69732), (3870, 65858), (3874, 65790), (3978, 64070), (4386, 58110), (4420, 57663), (4470, 57018), (5031, 50660), (5066, 50310), (5364, 47515), (5590, 45594), (5811, 43860), (6407, 39780), (6579, 38740), (6630, 38442), (6705, 38012), (6708, 37995), (7310, 34866), (7599, 33540), (7740, 32929), (7748, 32895), (7956, 32035), (8385, 30396), (8772, 29055), (8940, 28509), (9503, 26820), (9685, 26316), (9945, 25628), (10062, 25330), (10132, 25155), (10965, 23244), (11180, 22797), (11622, 21930), (12665, 20124), (12814, 19890), (13158, 19370), (13260, 19221), (13410, 19006), (14620, 17433), (15198, 16770)]