21263125

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{2617}}^1$

素因数の和:2650

約数の個数: 20

約数和(自身を含む): 28625212

約数和(自身を除く): 7362087

約数列:

[1, 5, 13, 25, 65, 125, 325, 625, 1625, 2617, 8125, 13085, 34021, 65425, 170105, 327125, 850525, 1635625, 4252625, 21263125]

約数ペア:

[(1, 21263125), (5, 4252625), (13, 1635625), (25, 850525), (65, 327125), (125, 170105), (325, 65425), (625, 34021), (1625, 13085), (2617, 8125)]