21857875

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{13451}}^1$

素因数の和:13479

約数の個数: 16

約数和(自身を含む): 29379168

約数和(自身を除く): 7521293

約数列:

[1, 5, 13, 25, 65, 125, 325, 1625, 13451, 67255, 174863, 336275, 874315, 1681375, 4371575, 21857875]

約数ペア:

[(1, 21857875), (5, 4371575), (13, 1681375), (25, 874315), (65, 336275), (125, 174863), (325, 67255), (1625, 13451)]