20001580

素因数分解:

$2^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{3559}}^1$

素因数の和:3849

約数の個数: 24

約数和(自身を含む): 42164640

約数和(自身を除く): 22163060

約数列:

[1, 2, 4, 5, 10, 20, 281, 562, 1124, 1405, 2810, 3559, 5620, 7118, 14236, 17795, 35590, 71180, 1000079, 2000158, 4000316, 5000395, 10000790, 20001580]

約数ペア:

[(1, 20001580), (2, 10000790), (4, 5000395), (5, 4000316), (10, 2000158), (20, 1000079), (281, 71180), (562, 35590), (1124, 17795), (1405, 14236), (2810, 7118), (3559, 5620)]