640426090

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{457}}^1\times {\mathrm{3259}}^1$

素因数の和:3766

約数の個数: 32

約数和(自身を含む): 1182519360

約数和(自身を除く): 542093270

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 457, 914, 2285, 3259, 4570, 6518, 16295, 19651, 32590, 39302, 98255, 140137, 196510, 280274, 700685, 1401370, 1489363, 2978726, 7446815, 14893630, 64042609, 128085218, 320213045, 640426090]

約数ペア:

[(1, 640426090), (2, 320213045), (5, 128085218), (10, 64042609), (43, 14893630), (86, 7446815), (215, 2978726), (430, 1489363), (457, 1401370), (914, 700685), (2285, 280274), (3259, 196510), (4570, 140137), (6518, 98255), (16295, 39302), (19651, 32590)]