21365980

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{6397}}^1$

素因数の和:6573

約数の個数: 24

約数和(自身を含む): 45144288

約数和(自身を除く): 23778308

約数列:

[1, 2, 4, 5, 10, 20, 167, 334, 668, 835, 1670, 3340, 6397, 12794, 25588, 31985, 63970, 127940, 1068299, 2136598, 4273196, 5341495, 10682990, 21365980]

約数ペア:

[(1, 21365980), (2, 10682990), (4, 5341495), (5, 4273196), (10, 2136598), (20, 1068299), (167, 127940), (334, 63970), (668, 31985), (835, 25588), (1670, 12794), (3340, 6397)]