20780708

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{2917}}^1$

素因数の和:3071

約数の個数: 24

約数和(自身を含む): 39463032

約数和(自身を除く): 18682324

約数列:

[1, 2, 4, 13, 26, 52, 137, 274, 548, 1781, 2917, 3562, 5834, 7124, 11668, 37921, 75842, 151684, 399629, 799258, 1598516, 5195177, 10390354, 20780708]

約数ペア:

[(1, 20780708), (2, 10390354), (4, 5195177), (13, 1598516), (26, 799258), (52, 399629), (137, 151684), (274, 75842), (548, 37921), (1781, 11668), (2917, 7124), (3562, 5834)]