640424044

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{587}}^1\times {\mathrm{20981}}^1$

素因数の和:21585

約数の個数: 24

約数和(自身を含む): 1209066768

約数和(自身を除く): 568642724

約数列:

[1, 2, 4, 13, 26, 52, 587, 1174, 2348, 7631, 15262, 20981, 30524, 41962, 83924, 272753, 545506, 1091012, 12315847, 24631694, 49263388, 160106011, 320212022, 640424044]

約数ペア:

[(1, 640424044), (2, 320212022), (4, 160106011), (13, 49263388), (26, 24631694), (52, 12315847), (587, 1091012), (1174, 545506), (2348, 272753), (7631, 83924), (15262, 41962), (20981, 30524)]