21718385

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{4987}}^1$

素因数の和:5072

約数の個数: 16

約数和(自身を含む): 28491456

約数和(自身を除く): 6773071

約数列:

[1, 5, 13, 65, 67, 335, 871, 4355, 4987, 24935, 64831, 324155, 334129, 1670645, 4343677, 21718385]

約数ペア:

[(1, 21718385), (5, 4343677), (13, 1670645), (65, 334129), (67, 324155), (335, 64831), (871, 24935), (4355, 4987)]