21635551

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1\times {\mathrm{557}}^1$

素因数の和:774

約数の個数: 16

約数和(自身を含む): 25712640

約数和(自身を除く): 4077089

約数列:

[1, 7, 31, 179, 217, 557, 1253, 3899, 5549, 17267, 38843, 99703, 120869, 697921, 3090793, 21635551]

約数ペア:

[(1, 21635551), (7, 3090793), (31, 697921), (179, 120869), (217, 99703), (557, 38843), (1253, 17267), (3899, 5549)]