398102120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{765581}}^1$

素因数の和:765605

約数の個数: 32

約数和(自身を含む): 964633320

約数和(自身を除く): 566531200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 765581, 1531162, 3062324, 3827905, 6124648, 7655810, 9952553, 15311620, 19905106, 30623240, 39810212, 49762765, 79620424, 99525530, 199051060, 398102120]

約数ペア:

[(1, 398102120), (2, 199051060), (4, 99525530), (5, 79620424), (8, 49762765), (10, 39810212), (13, 30623240), (20, 19905106), (26, 15311620), (40, 9952553), (52, 7655810), (65, 6124648), (104, 3827905), (130, 3062324), (260, 1531162), (520, 765581)]