20989359

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{587}}^1$

素因数の和:759

約数の個数: 24

約数和(自身を含む): 31646160

約数和(自身を除く): 10656801

約数列:

[1, 3, 9, 29, 87, 137, 261, 411, 587, 1233, 1761, 3973, 5283, 11919, 17023, 35757, 51069, 80419, 153207, 241257, 723771, 2332151, 6996453, 20989359]

約数ペア:

[(1, 20989359), (3, 6996453), (9, 2332151), (29, 723771), (87, 241257), (137, 153207), (261, 80419), (411, 51069), (587, 35757), (1233, 17023), (1761, 11919), (3973, 5283)]