19928440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{691}}^1$

素因数の和:812

約数の個数: 64

約数和(自身を含む): 51816960

約数和(自身を除く): 31888520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 103, 140, 206, 280, 412, 515, 691, 721, 824, 1030, 1382, 1442, 2060, 2764, 2884, 3455, 3605, 4120, 4837, 5528, 5768, 6910, 7210, 9674, 13820, 14420, 19348, 24185, 27640, 28840, 38696, 48370, 71173, 96740, 142346, 193480, 284692, 355865, 498211, 569384, 711730, 996422, 1423460, 1992844, 2491055, 2846920, 3985688, 4982110, 9964220, 19928440]

約数ペア:

[(1, 19928440), (2, 9964220), (4, 4982110), (5, 3985688), (7, 2846920), (8, 2491055), (10, 1992844), (14, 1423460), (20, 996422), (28, 711730), (35, 569384), (40, 498211), (56, 355865), (70, 284692), (103, 193480), (140, 142346), (206, 96740), (280, 71173), (412, 48370), (515, 38696), (691, 28840), (721, 27640), (824, 24185), (1030, 19348), (1382, 14420), (1442, 13820), (2060, 9674), (2764, 7210), (2884, 6910), (3455, 5768), (3605, 5528), (4120, 4837)]