639340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2459}}^1$

素因数の和:2481

約数の個数: 24

約数和(自身を含む): 1446480

約数和(自身を除く): 807140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2459, 4918, 9836, 12295, 24590, 31967, 49180, 63934, 127868, 159835, 319670, 639340]

約数ペア:

[(1, 639340), (2, 319670), (4, 159835), (5, 127868), (10, 63934), (13, 49180), (20, 31967), (26, 24590), (52, 12295), (65, 9836), (130, 4918), (260, 2459)]