639403209

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{479}}^1\times {\mathrm{2089}}^1$

素因数の和:2645

約数の個数: 24

約数和(自身を含む): 938995200

約数和(自身を除く): 299591991

約数列:

[1, 3, 9, 71, 213, 479, 639, 1437, 2089, 4311, 6267, 18801, 34009, 102027, 148319, 306081, 444957, 1000631, 1334871, 3001893, 9005679, 71044801, 213134403, 639403209]

約数ペア:

[(1, 639403209), (3, 213134403), (9, 71044801), (71, 9005679), (213, 3001893), (479, 1334871), (639, 1000631), (1437, 444957), (2089, 306081), (4311, 148319), (6267, 102027), (18801, 34009)]