255128120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{490631}}^1$

素因数の和:490655

約数の個数: 32

約数和(自身を含む): 618196320

約数和(自身を除く): 363068200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 490631, 981262, 1962524, 2453155, 3925048, 4906310, 6378203, 9812620, 12756406, 19625240, 25512812, 31891015, 51025624, 63782030, 127564060, 255128120]

約数ペア:

[(1, 255128120), (2, 127564060), (4, 63782030), (5, 51025624), (8, 31891015), (10, 25512812), (13, 19625240), (20, 12756406), (26, 9812620), (40, 6378203), (52, 4906310), (65, 3925048), (104, 2453155), (130, 1962524), (260, 981262), (520, 490631)]