128418820

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{30431}}^1$

素因数の和:30651

約数の個数: 24

約数和(自身を含む): 270966528

約数和(自身を除く): 142547708

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 30431, 60862, 121724, 152155, 304310, 608620, 6420941, 12841882, 25683764, 32104705, 64209410, 128418820]

約数ペア:

[(1, 128418820), (2, 64209410), (4, 32104705), (5, 25683764), (10, 12841882), (20, 6420941), (211, 608620), (422, 304310), (844, 152155), (1055, 121724), (2110, 60862), (4220, 30431)]