642621

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{431}}^1$

素因数の和:512

約数の個数: 16

約数和(自身を含む): 995328

約数和(自身を除く): 352707

約数列:

[1, 3, 7, 21, 71, 213, 431, 497, 1293, 1491, 3017, 9051, 30601, 91803, 214207, 642621]

約数ペア:

[(1, 642621), (3, 214207), (7, 91803), (21, 30601), (71, 9051), (213, 3017), (431, 1491), (497, 1293)]