640225.0000000

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{223}}^1$

素因数の和:433

約数の個数: 24

約数和(自身を含む): 4258688

約数和(自身を除く): 2020660

約数列:

[1, 2, 4, 13, 26, 52, 193, 223, 386, 446, 772, 892, 2509, 2899, 5018, 5798, 10036, 11596, 43039, 86078, 172156, 559507, 1119014, 2238028]

約数ペア:

[(1, 2238028), (2, 1119014), (4, 559507), (13, 172156), (26, 86078), (52, 43039), (193, 11596), (223, 10036), (386, 5798), (446, 5018), (772, 2899), (892, 2509)]