18807640

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1951}}^1$

素因数の和:2203

約数の個数: 32

約数和(自身を含む): 42514560

約数和(自身を除く): 23706920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 1951, 2410, 3902, 4820, 7804, 9640, 9755, 15608, 19510, 39020, 78040, 470191, 940382, 1880764, 2350955, 3761528, 4701910, 9403820, 18807640]

約数ペア:

[(1, 18807640), (2, 9403820), (4, 4701910), (5, 3761528), (8, 2350955), (10, 1880764), (20, 940382), (40, 470191), (241, 78040), (482, 39020), (964, 19510), (1205, 15608), (1928, 9755), (1951, 9640), (2410, 7804), (3902, 4820)]