21198980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{577}}^1$

素因数の和:764

約数の個数: 48

約数和(自身を含む): 48940416

約数和(自身を除く): 27741436

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 167, 220, 334, 577, 668, 835, 1154, 1670, 1837, 2308, 2885, 3340, 3674, 5770, 6347, 7348, 9185, 11540, 12694, 18370, 25388, 31735, 36740, 63470, 96359, 126940, 192718, 385436, 481795, 963590, 1059949, 1927180, 2119898, 4239796, 5299745, 10599490, 21198980]

約数ペア:

[(1, 21198980), (2, 10599490), (4, 5299745), (5, 4239796), (10, 2119898), (11, 1927180), (20, 1059949), (22, 963590), (44, 481795), (55, 385436), (110, 192718), (167, 126940), (220, 96359), (334, 63470), (577, 36740), (668, 31735), (835, 25388), (1154, 18370), (1670, 12694), (1837, 11540), (2308, 9185), (2885, 7348), (3340, 6347), (3674, 5770)]