21710511

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{2459}}^1$

素因数の和:2580

約数の個数: 20

約数和(自身を含む): 32742600

約数和(自身を除く): 11032089

約数列:

[1, 3, 9, 27, 81, 109, 327, 981, 2459, 2943, 7377, 8829, 22131, 66393, 199179, 268031, 804093, 2412279, 7236837, 21710511]

約数ペア:

[(1, 21710511), (3, 7236837), (9, 2412279), (27, 804093), (81, 268031), (109, 199179), (327, 66393), (981, 22131), (2459, 8829), (2943, 7377)]