21045625

素因数分解:

$5^4\times {\mathrm{151}}^1\times {\mathrm{223}}^1$

素因数の和:394

約数の個数: 20

約数和(自身を含む): 26591488

約数和(自身を除く): 5545863

約数列:

[1, 5, 25, 125, 151, 223, 625, 755, 1115, 3775, 5575, 18875, 27875, 33673, 94375, 139375, 168365, 841825, 4209125, 21045625]

約数ペア:

[(1, 21045625), (5, 4209125), (25, 841825), (125, 168365), (151, 139375), (223, 94375), (625, 33673), (755, 27875), (1115, 18875), (3775, 5575)]