81561020

素因数分解:

$2^2\times 5^1\times {\mathrm{1823}}^1\times {\mathrm{2237}}^1$

素因数の和:4069

約数の個数: 24

約数和(自身を含む): 171448704

約数和(自身を除く): 89887684

約数列:

[1, 2, 4, 5, 10, 20, 1823, 2237, 3646, 4474, 7292, 8948, 9115, 11185, 18230, 22370, 36460, 44740, 4078051, 8156102, 16312204, 20390255, 40780510, 81561020]

約数ペア:

[(1, 81561020), (2, 40780510), (4, 20390255), (5, 16312204), (10, 8156102), (20, 4078051), (1823, 44740), (2237, 36460), (3646, 22370), (4474, 18230), (7292, 11185), (8948, 9115)]