21144940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62191}}^1$

素因数の和:62217

約数の個数: 24

約数和(自身を含む): 47017152

約数和(自身を除く): 25872212

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62191, 124382, 248764, 310955, 621910, 1057247, 1243820, 2114494, 4228988, 5286235, 10572470, 21144940]

約数ペア:

[(1, 21144940), (2, 10572470), (4, 5286235), (5, 4228988), (10, 2114494), (17, 1243820), (20, 1057247), (34, 621910), (68, 310955), (85, 248764), (170, 124382), (340, 62191)]