21795625

素因数分解:

$5^4\times {\mathrm{43}}^1\times {\mathrm{811}}^1$

素因数の和:874

約数の個数: 20

約数和(自身を含む): 27903568

約数和(自身を除く): 6107943

約数列:

[1, 5, 25, 43, 125, 215, 625, 811, 1075, 4055, 5375, 20275, 26875, 34873, 101375, 174365, 506875, 871825, 4359125, 21795625]

約数ペア:

[(1, 21795625), (5, 4359125), (25, 871825), (43, 506875), (125, 174365), (215, 101375), (625, 34873), (811, 26875), (1075, 20275), (4055, 5375)]