639804571

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{20443}}^1$

素因数の和:20730

約数の個数: 16

約数和(自身を含む): 777199104

約数和(自身を除く): 137394533

約数列:

[1, 7, 17, 119, 263, 1841, 4471, 20443, 31297, 143101, 347531, 2432717, 5376509, 37635563, 91400653, 639804571]

約数ペア:

[(1, 639804571), (7, 91400653), (17, 37635563), (119, 5376509), (263, 2432717), (1841, 347531), (4471, 143101), (20443, 31297)]