81022180

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{12239}}^1$

素因数の和:12579

約数の個数: 24

約数和(自身を含む): 170674560

約数和(自身を除く): 89652380

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3310, 6620, 12239, 24478, 48956, 61195, 122390, 244780, 4051109, 8102218, 16204436, 20255545, 40511090, 81022180]

約数ペア:

[(1, 81022180), (2, 40511090), (4, 20255545), (5, 16204436), (10, 8102218), (20, 4051109), (331, 244780), (662, 122390), (1324, 61195), (1655, 48956), (3310, 24478), (6620, 12239)]