21072571

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{983}}^1$

素因数の和:1110

約数の個数: 16

約数和(自身を含む): 24300864

約数和(自身を除く): 3228293

約数列:

[1, 13, 17, 97, 221, 983, 1261, 1649, 12779, 16711, 21437, 95351, 217243, 1239563, 1620967, 21072571]

約数ペア:

[(1, 21072571), (13, 1620967), (17, 1239563), (97, 217243), (221, 95351), (983, 21437), (1261, 16711), (1649, 12779)]