81521560

素因数分解:

$2^3\times 5^1\times {\mathrm{2038039}}^1$

素因数の和:2038050

約数の個数: 16

約数和(自身を含む): 183423600

約数和(自身を除く): 101902040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2038039, 4076078, 8152156, 10190195, 16304312, 20380390, 40760780, 81521560]

約数ペア:

[(1, 81521560), (2, 40760780), (4, 20380390), (5, 16304312), (8, 10190195), (10, 8152156), (20, 4076078), (40, 2038039)]