21320690

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1\times {\mathrm{277}}^1$

素因数の和:506

約数の個数: 32

約数和(自身を含む): 39631680

約数和(自身を除く): 18310990

約数列:

[1, 2, 5, 10, 43, 86, 179, 215, 277, 358, 430, 554, 895, 1385, 1790, 2770, 7697, 11911, 15394, 23822, 38485, 49583, 59555, 76970, 99166, 119110, 247915, 495830, 2132069, 4264138, 10660345, 21320690]

約数ペア:

[(1, 21320690), (2, 10660345), (5, 4264138), (10, 2132069), (43, 495830), (86, 247915), (179, 119110), (215, 99166), (277, 76970), (358, 59555), (430, 49583), (554, 38485), (895, 23822), (1385, 15394), (1790, 11911), (2770, 7697)]