21580940

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{8237}}^1$

素因数の和:8377

約数の個数: 24

約数和(自身を含む): 45671472

約数和(自身を除く): 24090532

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 8237, 16474, 32948, 41185, 82370, 164740, 1079047, 2158094, 4316188, 5395235, 10790470, 21580940]

約数ペア:

[(1, 21580940), (2, 10790470), (4, 5395235), (5, 4316188), (10, 2158094), (20, 1079047), (131, 164740), (262, 82370), (524, 41185), (655, 32948), (1310, 16474), (2620, 8237)]