21101080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:90

約数の個数: 256

約数和(自身を含む): 69672960

約数和(自身を除く): 48571880

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 17, 20, 22, 26, 28, 31, 34, 35, 40, 44, 52, 55, 56, 62, 65, 68, 70, 77, 85, 88, 91, 104, 110, 119, 124, 130, 136, 140, 143, 154, 155, 170, 182, 187, 217, 220, 221, 238, 248, 260, 280, 286, 308, 310, 340, 341, 364, 374, 385, 403, 434, 440, 442, 455, 476, 520, 527, 572, 595, 616, 620, 680, 682, 715, 728, 748, 770, 806, 868, 884, 910, 935, 952, 1001, 1054, 1085, 1105, 1144, 1190, 1240, 1309, 1364, 1430, 1496, 1540, 1547, 1612, 1705, 1736, 1768, 1820, 1870, 2002, 2015, 2108, 2170, 2210, 2380, 2387, 2431, 2618, 2635, 2728, 2821, 2860, 3080, 3094, 3224, 3410, 3640, 3689, 3740, 4004, 4030, 4216, 4340, 4420, 4433, 4760, 4774, 4862, 5005, 5236, 5270, 5642, 5720, 5797, 6188, 6545, 6820, 6851, 7378, 7480, 7735, 8008, 8060, 8680, 8840, 8866, 9548, 9724, 10010, 10472, 10540, 11284, 11594, 11935, 12155, 12376, 13090, 13640, 13702, 14105, 14756, 15470, 16120, 17017, 17732, 18445, 19096, 19448, 20020, 21080, 22165, 22568, 23188, 23870, 24310, 26180, 27404, 28210, 28985, 29512, 30940, 31031, 34034, 34255, 35464, 36890, 40040, 40579, 44330, 46376, 47740, 47957, 48620, 52360, 54808, 56420, 57970, 61880, 62062, 68068, 68510, 73780, 75361, 81158, 85085, 88660, 95480, 95914, 97240, 112840, 115940, 124124, 136136, 137020, 147560, 150722, 155155, 162316, 170170, 177320, 191828, 202895, 231880, 239785, 248248, 274040, 301444, 310310, 324632, 340340, 376805, 383656, 405790, 479570, 527527, 602888, 620620, 680680, 753610, 811580, 959140, 1055054, 1241240, 1507220, 1623160, 1918280, 2110108, 2637635, 3014440, 4220216, 5275270, 10550540, 21101080]

約数ペア:

[(1, 21101080), (2, 10550540), (4, 5275270), (5, 4220216), (7, 3014440), (8, 2637635), (10, 2110108), (11, 1918280), (13, 1623160), (14, 1507220), (17, 1241240), (20, 1055054), (22, 959140), (26, 811580), (28, 753610), (31, 680680), (34, 620620), (35, 602888), (40, 527527), (44, 479570), (52, 405790), (55, 383656), (56, 376805), (62, 340340), (65, 324632), (68, 310310), (70, 301444), (77, 274040), (85, 248248), (88, 239785), (91, 231880), (104, 202895), (110, 191828), (119, 177320), (124, 170170), (130, 162316), (136, 155155), (140, 150722), (143, 147560), (154, 137020), (155, 136136), (170, 124124), (182, 115940), (187, 112840), (217, 97240), (220, 95914), (221, 95480), (238, 88660), (248, 85085), (260, 81158), (280, 75361), (286, 73780), (308, 68510), (310, 68068), (340, 62062), (341, 61880), (364, 57970), (374, 56420), (385, 54808), (403, 52360), (434, 48620), (440, 47957), (442, 47740), (455, 46376), (476, 44330), (520, 40579), (527, 40040), (572, 36890), (595, 35464), (616, 34255), (620, 34034), (680, 31031), (682, 30940), (715, 29512), (728, 28985), (748, 28210), (770, 27404), (806, 26180), (868, 24310), (884, 23870), (910, 23188), (935, 22568), (952, 22165), (1001, 21080), (1054, 20020), (1085, 19448), (1105, 19096), (1144, 18445), (1190, 17732), (1240, 17017), (1309, 16120), (1364, 15470), (1430, 14756), (1496, 14105), (1540, 13702), (1547, 13640), (1612, 13090), (1705, 12376), (1736, 12155), (1768, 11935), (1820, 11594), (1870, 11284), (2002, 10540), (2015, 10472), (2108, 10010), (2170, 9724), (2210, 9548), (2380, 8866), (2387, 8840), (2431, 8680), (2618, 8060), (2635, 8008), (2728, 7735), (2821, 7480), (2860, 7378), (3080, 6851), (3094, 6820), (3224, 6545), (3410, 6188), (3640, 5797), (3689, 5720), (3740, 5642), (4004, 5270), (4030, 5236), (4216, 5005), (4340, 4862), (4420, 4774), (4433, 4760)]