80623640

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{6481}}^1$

素因数の和:6803

約数の個数: 32

約数和(自身を含む): 182014560

約数和(自身を除く): 101390920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 2488, 3110, 6220, 6481, 12440, 12962, 25924, 32405, 51848, 64810, 129620, 259240, 2015591, 4031182, 8062364, 10077955, 16124728, 20155910, 40311820, 80623640]

約数ペア:

[(1, 80623640), (2, 40311820), (4, 20155910), (5, 16124728), (8, 10077955), (10, 8062364), (20, 4031182), (40, 2015591), (311, 259240), (622, 129620), (1244, 64810), (1555, 51848), (2488, 32405), (3110, 25924), (6220, 12962), (6481, 12440)]