21530151

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{887}}^1$

素因数の和:956

約数の個数: 32

約数和(自身を含む): 34099200

約数和(自身を除く): 12569049

約数列:

[1, 3, 9, 27, 29, 31, 87, 93, 261, 279, 783, 837, 887, 899, 2661, 2697, 7983, 8091, 23949, 24273, 25723, 27497, 77169, 82491, 231507, 247473, 694521, 742419, 797413, 2392239, 7176717, 21530151]

約数ペア:

[(1, 21530151), (3, 7176717), (9, 2392239), (27, 797413), (29, 742419), (31, 694521), (87, 247473), (93, 231507), (261, 82491), (279, 77169), (783, 27497), (837, 25723), (887, 24273), (899, 23949), (2661, 8091), (2697, 7983)]