21163880

素因数分解:

$2^3\times 5^1\times {\mathrm{529097}}^1$

素因数の和:529108

約数の個数: 16

約数和(自身を含む): 47618820

約数和(自身を除く): 26454940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 529097, 1058194, 2116388, 2645485, 4232776, 5290970, 10581940, 21163880]

約数ペア:

[(1, 21163880), (2, 10581940), (4, 5290970), (5, 4232776), (8, 2645485), (10, 2116388), (20, 1058194), (40, 529097)]