648080

素因数分解:

$2^4\times 5^1\times {\mathrm{8101}}^1$

素因数の和:8114

約数の個数: 20

約数和(自身を含む): 1506972

約数和(自身を除く): 858892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8101, 16202, 32404, 40505, 64808, 81010, 129616, 162020, 324040, 648080]

約数ペア:

[(1, 648080), (2, 324040), (4, 162020), (5, 129616), (8, 81010), (10, 64808), (16, 40505), (20, 32404), (40, 16202), (80, 8101)]