209987967

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{140837}}^1$

素因数の和:140918

約数の個数: 16

約数和(自身を含む): 324490752

約数和(自身を除く): 114502785

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 140837, 422511, 985859, 2957577, 9999427, 29998281, 69995989, 209987967]

約数ペア:

[(1, 209987967), (3, 69995989), (7, 29998281), (21, 9999427), (71, 2957577), (213, 985859), (497, 422511), (1491, 140837)]