21991541

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{5303}}^1$

素因数の和:5356

約数の個数: 16

約数和(自身を含む): 26732160

約数和(自身を除く): 4740619

約数列:

[1, 11, 13, 29, 143, 319, 377, 4147, 5303, 58333, 68939, 153787, 758329, 1691657, 1999231, 21991541]

約数ペア:

[(1, 21991541), (11, 1999231), (13, 1691657), (29, 758329), (143, 153787), (319, 68939), (377, 58333), (4147, 5303)]