21497205

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{33329}}^1$

素因数の和:33380

約数の個数: 16

約数和(自身を含む): 35196480

約数和(自身を除く): 13699275

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 33329, 99987, 166645, 499935, 1433147, 4299441, 7165735, 21497205]

約数ペア:

[(1, 21497205), (3, 7165735), (5, 4299441), (15, 1433147), (43, 499935), (129, 166645), (215, 99987), (645, 33329)]