80407820

素因数分解:

$2^2\times 5^1\times {\mathrm{1289}}^1\times {\mathrm{3119}}^1$

素因数の和:4417

約数の個数: 24

約数和(自身を含む): 169041600

約数和(自身を除く): 88633780

約数列:

[1, 2, 4, 5, 10, 20, 1289, 2578, 3119, 5156, 6238, 6445, 12476, 12890, 15595, 25780, 31190, 62380, 4020391, 8040782, 16081564, 20101955, 40203910, 80407820]

約数ペア:

[(1, 80407820), (2, 40203910), (4, 20101955), (5, 16081564), (10, 8040782), (20, 4020391), (1289, 62380), (2578, 31190), (3119, 25780), (5156, 15595), (6238, 12890), (6445, 12476)]