21001125

素因数分解:

$3^1\times 5^3\times {\mathrm{56003}}^1$

素因数の和:56021

約数の個数: 16

約数和(自身を含む): 34946496

約数和(自身を除く): 13945371

約数列:

[1, 3, 5, 15, 25, 75, 125, 375, 56003, 168009, 280015, 840045, 1400075, 4200225, 7000375, 21001125]

約数ペア:

[(1, 21001125), (3, 7000375), (5, 4200225), (15, 1400075), (25, 840045), (75, 280015), (125, 168009), (375, 56003)]