21307221

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{677}}^1$

素因数の和:965

約数の個数: 24

約数和(自身を含む): 33316920

約数和(自身を除く): 12009699

約数列:

[1, 3, 9, 13, 39, 117, 269, 677, 807, 2031, 2421, 3497, 6093, 8801, 10491, 26403, 31473, 79209, 182113, 546339, 1639017, 2367469, 7102407, 21307221]

約数ペア:

[(1, 21307221), (3, 7102407), (9, 2367469), (13, 1639017), (39, 546339), (117, 182113), (269, 79209), (677, 31473), (807, 26403), (2031, 10491), (2421, 8801), (3497, 6093)]