85808020

素因数分解:

$2^2\times 5^1\times {\mathrm{1571}}^1\times {\mathrm{2731}}^1$

素因数の和:4311

約数の個数: 24

約数和(自身を含む): 180377568

約数和(自身を除く): 94569548

約数列:

[1, 2, 4, 5, 10, 20, 1571, 2731, 3142, 5462, 6284, 7855, 10924, 13655, 15710, 27310, 31420, 54620, 4290401, 8580802, 17161604, 21452005, 42904010, 85808020]

約数ペア:

[(1, 85808020), (2, 42904010), (4, 21452005), (5, 17161604), (10, 8580802), (20, 4290401), (1571, 54620), (2731, 31420), (3142, 27310), (5462, 15710), (6284, 13655), (7855, 10924)]