21642129

素因数分解:

$3^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{499}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 32240000

約数和(自身を除く): 10597871

約数列:

[1, 3, 9, 61, 79, 183, 237, 499, 549, 711, 1497, 4491, 4819, 14457, 30439, 39421, 43371, 91317, 118263, 273951, 354789, 2404681, 7214043, 21642129]

約数ペア:

[(1, 21642129), (3, 7214043), (9, 2404681), (61, 354789), (79, 273951), (183, 118263), (237, 91317), (499, 43371), (549, 39421), (711, 30439), (1497, 14457), (4491, 4819)]