77989240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{3923}}^1$

素因数の和:4012

約数の個数: 64

約数和(自身を含む): 203420160

約数和(自身を除く): 125430920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1988, 2485, 2840, 3923, 3976, 4970, 7846, 9940, 15692, 19615, 19880, 27461, 31384, 39230, 54922, 78460, 109844, 137305, 156920, 219688, 274610, 278533, 549220, 557066, 1098440, 1114132, 1392665, 1949731, 2228264, 2785330, 3899462, 5570660, 7798924, 9748655, 11141320, 15597848, 19497310, 38994620, 77989240]

約数ペア:

[(1, 77989240), (2, 38994620), (4, 19497310), (5, 15597848), (7, 11141320), (8, 9748655), (10, 7798924), (14, 5570660), (20, 3899462), (28, 2785330), (35, 2228264), (40, 1949731), (56, 1392665), (70, 1114132), (71, 1098440), (140, 557066), (142, 549220), (280, 278533), (284, 274610), (355, 219688), (497, 156920), (568, 137305), (710, 109844), (994, 78460), (1420, 54922), (1988, 39230), (2485, 31384), (2840, 27461), (3923, 19880), (3976, 19615), (4970, 15692), (7846, 9940)]