20007020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{431}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 46158336

約数和(自身を除く): 26151316

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 211, 220, 422, 431, 844, 862, 1055, 1724, 2110, 2155, 2321, 4220, 4310, 4642, 4741, 8620, 9284, 9482, 11605, 18964, 23210, 23705, 46420, 47410, 90941, 94820, 181882, 363764, 454705, 909410, 1000351, 1818820, 2000702, 4001404, 5001755, 10003510, 20007020]

約数ペア:

[(1, 20007020), (2, 10003510), (4, 5001755), (5, 4001404), (10, 2000702), (11, 1818820), (20, 1000351), (22, 909410), (44, 454705), (55, 363764), (110, 181882), (211, 94820), (220, 90941), (422, 47410), (431, 46420), (844, 23705), (862, 23210), (1055, 18964), (1724, 11605), (2110, 9482), (2155, 9284), (2321, 8620), (4220, 4741), (4310, 4642)]