20639480

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{3463}}^1$

素因数の和:3623

約数の個数: 32

約数和(自身を含む): 46764000

約数和(自身を除く): 26124520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 3463, 5960, 6926, 13852, 17315, 27704, 34630, 69260, 138520, 515987, 1031974, 2063948, 2579935, 4127896, 5159870, 10319740, 20639480]

約数ペア:

[(1, 20639480), (2, 10319740), (4, 5159870), (5, 4127896), (8, 2579935), (10, 2063948), (20, 1031974), (40, 515987), (149, 138520), (298, 69260), (596, 34630), (745, 27704), (1192, 17315), (1490, 13852), (2980, 6926), (3463, 5960)]