640018730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4923221}}^1$

素因数の和:4923241

約数の個数: 16

約数和(自身を含む): 1240651944

約数和(自身を除く): 600633214

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 4923221, 9846442, 24616105, 49232210, 64001873, 128003746, 320009365, 640018730]

約数ペア:

[(1, 640018730), (2, 320009365), (5, 128003746), (10, 64001873), (13, 49232210), (26, 24616105), (65, 9846442), (130, 4923221)]