19872080

素因数分解:

$2^4\times 5^1\times {\mathrm{248401}}^1$

素因数の和:248414

約数の個数: 20

約数和(自身を含む): 46202772

約数和(自身を除く): 26330692

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248401, 496802, 993604, 1242005, 1987208, 2484010, 3974416, 4968020, 9936040, 19872080]

約数ペア:

[(1, 19872080), (2, 9936040), (4, 4968020), (5, 3974416), (8, 2484010), (10, 1987208), (16, 1242005), (20, 993604), (40, 496802), (80, 248401)]