87720820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{398731}}^1$

素因数の和:398751

約数の個数: 24

約数和(自身を含む): 200960928

約数和(自身を除く): 113240108

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 398731, 797462, 1594924, 1993655, 3987310, 4386041, 7974620, 8772082, 17544164, 21930205, 43860410, 87720820]

約数ペア:

[(1, 87720820), (2, 43860410), (4, 21930205), (5, 17544164), (10, 8772082), (11, 7974620), (20, 4386041), (22, 3987310), (44, 1993655), (55, 1594924), (110, 797462), (220, 398731)]