21030225

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6521}}^1$

素因数の和:6577

約数の個数: 24

約数和(自身を含む): 35584032

約数和(自身を除く): 14553807

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6521, 19563, 32605, 97815, 163025, 280403, 489075, 841209, 1402015, 4206045, 7010075, 21030225]

約数ペア:

[(1, 21030225), (3, 7010075), (5, 4206045), (15, 1402015), (25, 841209), (43, 489075), (75, 280403), (129, 163025), (215, 97815), (645, 32605), (1075, 19563), (3225, 6521)]