20855940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1$

素因数の和:186

約数の個数: 192

約数和(自身を含む): 74317824

約数和(自身を除く): 53461884

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 23, 28, 30, 34, 35, 42, 46, 51, 60, 68, 69, 70, 84, 85, 92, 102, 105, 115, 119, 127, 138, 140, 161, 170, 204, 210, 230, 238, 254, 255, 276, 322, 340, 345, 357, 381, 391, 420, 460, 476, 483, 508, 510, 595, 635, 644, 690, 714, 762, 782, 805, 889, 966, 1020, 1173, 1190, 1270, 1380, 1428, 1524, 1564, 1610, 1778, 1785, 1905, 1932, 1955, 2159, 2346, 2380, 2415, 2540, 2667, 2737, 2921, 3220, 3556, 3570, 3810, 3910, 4318, 4445, 4692, 4830, 5334, 5474, 5842, 5865, 6477, 7140, 7620, 7820, 8211, 8636, 8763, 8890, 9660, 10668, 10795, 10948, 11684, 11730, 12954, 13335, 13685, 14605, 15113, 16422, 17526, 17780, 20447, 21590, 23460, 25908, 26670, 27370, 29210, 30226, 32385, 32844, 35052, 40894, 41055, 43180, 43815, 45339, 49657, 53340, 54740, 58420, 60452, 61341, 64770, 75565, 81788, 82110, 87630, 90678, 99314, 102235, 122682, 129540, 148971, 151130, 164220, 175260, 181356, 198628, 204470, 226695, 245364, 248285, 297942, 302260, 306705, 347599, 408940, 453390, 496570, 595884, 613410, 695198, 744855, 906780, 993140, 1042797, 1226820, 1390396, 1489710, 1737995, 2085594, 2979420, 3475990, 4171188, 5213985, 6951980, 10427970, 20855940]

約数ペア:

[(1, 20855940), (2, 10427970), (3, 6951980), (4, 5213985), (5, 4171188), (6, 3475990), (7, 2979420), (10, 2085594), (12, 1737995), (14, 1489710), (15, 1390396), (17, 1226820), (20, 1042797), (21, 993140), (23, 906780), (28, 744855), (30, 695198), (34, 613410), (35, 595884), (42, 496570), (46, 453390), (51, 408940), (60, 347599), (68, 306705), (69, 302260), (70, 297942), (84, 248285), (85, 245364), (92, 226695), (102, 204470), (105, 198628), (115, 181356), (119, 175260), (127, 164220), (138, 151130), (140, 148971), (161, 129540), (170, 122682), (204, 102235), (210, 99314), (230, 90678), (238, 87630), (254, 82110), (255, 81788), (276, 75565), (322, 64770), (340, 61341), (345, 60452), (357, 58420), (381, 54740), (391, 53340), (420, 49657), (460, 45339), (476, 43815), (483, 43180), (508, 41055), (510, 40894), (595, 35052), (635, 32844), (644, 32385), (690, 30226), (714, 29210), (762, 27370), (782, 26670), (805, 25908), (889, 23460), (966, 21590), (1020, 20447), (1173, 17780), (1190, 17526), (1270, 16422), (1380, 15113), (1428, 14605), (1524, 13685), (1564, 13335), (1610, 12954), (1778, 11730), (1785, 11684), (1905, 10948), (1932, 10795), (1955, 10668), (2159, 9660), (2346, 8890), (2380, 8763), (2415, 8636), (2540, 8211), (2667, 7820), (2737, 7620), (2921, 7140), (3220, 6477), (3556, 5865), (3570, 5842), (3810, 5474), (3910, 5334), (4318, 4830), (4445, 4692)]