20643945

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28087}}^1$

素因数の和:28109

約数の個数: 24

約数和(自身を含む): 38424384

約数和(自身を除く): 17780439

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28087, 84261, 140435, 196609, 421305, 589827, 983045, 1376263, 2949135, 4128789, 6881315, 20643945]

約数ペア:

[(1, 20643945), (3, 6881315), (5, 4128789), (7, 2949135), (15, 1376263), (21, 983045), (35, 589827), (49, 421305), (105, 196609), (147, 140435), (245, 84261), (735, 28087)]