19671640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11437}}^1$

素因数の和:11491

約数の個数: 32

約数和(自身を含む): 45294480

約数和(自身を除く): 25622840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11437, 22874, 45748, 57185, 91496, 114370, 228740, 457480, 491791, 983582, 1967164, 2458955, 3934328, 4917910, 9835820, 19671640]

約数ペア:

[(1, 19671640), (2, 9835820), (4, 4917910), (5, 3934328), (8, 2458955), (10, 1967164), (20, 983582), (40, 491791), (43, 457480), (86, 228740), (172, 114370), (215, 91496), (344, 57185), (430, 45748), (860, 22874), (1720, 11437)]