21979400

素因数分解:

$2^3\times 5^2\times {\mathrm{109897}}^1$

素因数の和:109913

約数の個数: 24

約数和(自身を含む): 51102570

約数和(自身を除く): 29123170

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 109897, 219794, 439588, 549485, 879176, 1098970, 2197940, 2747425, 4395880, 5494850, 10989700, 21979400]

約数ペア:

[(1, 21979400), (2, 10989700), (4, 5494850), (5, 4395880), (8, 2747425), (10, 2197940), (20, 1098970), (25, 879176), (40, 549485), (50, 439588), (100, 219794), (200, 109897)]