21266881

素因数分解:

${\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{499}}^1$

素因数の和:648

約数の個数: 16

約数和(自身を含む): 23760000

約数和(自身を除く): 2493119

約数列:

[1, 17, 23, 109, 391, 499, 1853, 2507, 8483, 11477, 42619, 54391, 195109, 924647, 1250993, 21266881]

約数ペア:

[(1, 21266881), (17, 1250993), (23, 924647), (109, 195109), (391, 54391), (499, 42619), (1853, 11477), (2507, 8483)]