87644020

素因数分解:

$2^2\times 5^1\times {\mathrm{4382201}}^1$

素因数の和:4382210

約数の個数: 12

約数和(自身を含む): 184052484

約数和(自身を除く): 96408464

約数列:

[1, 2, 4, 5, 10, 20, 4382201, 8764402, 17528804, 21911005, 43822010, 87644020]

約数ペア:

[(1, 87644020), (2, 43822010), (4, 21911005), (5, 17528804), (10, 8764402), (20, 4382201)]