21505625

素因数分解:

$5^4\times {\mathrm{19}}^1\times {\mathrm{1811}}^1$

素因数の和:1850

約数の個数: 20

約数和(自身を含む): 28303440

約数和(自身を除く): 6797815

約数列:

[1, 5, 19, 25, 95, 125, 475, 625, 1811, 2375, 9055, 11875, 34409, 45275, 172045, 226375, 860225, 1131875, 4301125, 21505625]

約数ペア:

[(1, 21505625), (5, 4301125), (19, 1131875), (25, 860225), (95, 226375), (125, 172045), (475, 45275), (625, 34409), (1811, 11875), (2375, 9055)]