788757140

素因数分解:

$2^2\times 5^1\times {\mathrm{4001}}^1\times {\mathrm{9857}}^1$

素因数の和:13867

約数の個数: 24

約数和(自身を含む): 1656972072

約数和(自身を除く): 868214932

約数列:

[1, 2, 4, 5, 10, 20, 4001, 8002, 9857, 16004, 19714, 20005, 39428, 40010, 49285, 80020, 98570, 197140, 39437857, 78875714, 157751428, 197189285, 394378570, 788757140]

約数ペア:

[(1, 788757140), (2, 394378570), (4, 197189285), (5, 157751428), (10, 78875714), (20, 39437857), (4001, 197140), (8002, 98570), (9857, 80020), (16004, 49285), (19714, 40010), (20005, 39428)]