640998

素因数分解:

$2^1\times 3^2\times {\mathrm{149}}^1\times {\mathrm{239}}^1$

素因数の和:396

約数の個数: 24

約数和(自身を含む): 1404000

約数和(自身を除く): 763002

約数列:

[1, 2, 3, 6, 9, 18, 149, 239, 298, 447, 478, 717, 894, 1341, 1434, 2151, 2682, 4302, 35611, 71222, 106833, 213666, 320499, 640998]

約数ペア:

[(1, 640998), (2, 320499), (3, 213666), (6, 106833), (9, 71222), (18, 35611), (149, 4302), (239, 2682), (298, 2151), (447, 1434), (478, 1341), (717, 894)]