491380

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{311}}^1$

素因数の和:399

約数の個数: 24

約数和(自身を含む): 1048320

約数和(自身を除く): 556940

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 311, 316, 395, 622, 790, 1244, 1555, 1580, 3110, 6220, 24569, 49138, 98276, 122845, 245690, 491380]

約数ペア:

[(1, 491380), (2, 245690), (4, 122845), (5, 98276), (10, 49138), (20, 24569), (79, 6220), (158, 3110), (311, 1580), (316, 1555), (395, 1244), (622, 790)]