31885640

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1949}}^1$

素因数の和:2369

約数の個数: 32

約数和(自身を含む): 71955000

約数和(自身を除く): 40069360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 1949, 2045, 3272, 3898, 4090, 7796, 8180, 9745, 15592, 16360, 19490, 38980, 77960, 797141, 1594282, 3188564, 3985705, 6377128, 7971410, 15942820, 31885640]

約数ペア:

[(1, 31885640), (2, 15942820), (4, 7971410), (5, 6377128), (8, 3985705), (10, 3188564), (20, 1594282), (40, 797141), (409, 77960), (818, 38980), (1636, 19490), (1949, 16360), (2045, 15592), (3272, 9745), (3898, 8180), (4090, 7796)]