21399830

素因数分解:

$2^1\times 5^1\times {\mathrm{613}}^1\times {\mathrm{3491}}^1$

素因数の和:4111

約数の個数: 16

約数和(自身を含む): 38593584

約数和(自身を除く): 17193754

約数列:

[1, 2, 5, 10, 613, 1226, 3065, 3491, 6130, 6982, 17455, 34910, 2139983, 4279966, 10699915, 21399830]

約数ペア:

[(1, 21399830), (2, 10699915), (5, 4279966), (10, 2139983), (613, 34910), (1226, 17455), (3065, 6982), (3491, 6130)]