81637960

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{4871}}^1$

素因数の和:5301

約数の個数: 32

約数和(自身を含む): 184161600

約数和(自身を除く): 102523640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1676, 2095, 3352, 4190, 4871, 8380, 9742, 16760, 19484, 24355, 38968, 48710, 97420, 194840, 2040949, 4081898, 8163796, 10204745, 16327592, 20409490, 40818980, 81637960]

約数ペア:

[(1, 81637960), (2, 40818980), (4, 20409490), (5, 16327592), (8, 10204745), (10, 8163796), (20, 4081898), (40, 2040949), (419, 194840), (838, 97420), (1676, 48710), (2095, 38968), (3352, 24355), (4190, 19484), (4871, 16760), (8380, 9742)]