81755780

素因数分解:

$2^2\times 5^1\times {\mathrm{571}}^1\times {\mathrm{7159}}^1$

素因数の和:7739

約数の個数: 24

約数和(自身を含む): 172011840

約数和(自身を除く): 90256060

約数列:

[1, 2, 4, 5, 10, 20, 571, 1142, 2284, 2855, 5710, 7159, 11420, 14318, 28636, 35795, 71590, 143180, 4087789, 8175578, 16351156, 20438945, 40877890, 81755780]

約数ペア:

[(1, 81755780), (2, 40877890), (4, 20438945), (5, 16351156), (10, 8175578), (20, 4087789), (571, 143180), (1142, 71590), (2284, 35795), (2855, 28636), (5710, 14318), (7159, 11420)]