21719815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{859}}^1$

素因数の和:1266

約数の個数: 16

約数和(自身を含む): 28173600

約数和(自身を除く): 6453785

約数列:

[1, 5, 13, 65, 389, 859, 1945, 4295, 5057, 11167, 25285, 55835, 334151, 1670755, 4343963, 21719815]

約数ペア:

[(1, 21719815), (5, 4343963), (13, 1670755), (65, 334151), (389, 55835), (859, 25285), (1945, 11167), (4295, 5057)]