21978200

素因数分解:

$2^3\times 5^2\times {\mathrm{109891}}^1$

素因数の和:109907

約数の個数: 24

約数和(自身を含む): 51099780

約数和(自身を除く): 29121580

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 109891, 219782, 439564, 549455, 879128, 1098910, 2197820, 2747275, 4395640, 5494550, 10989100, 21978200]

約数ペア:

[(1, 21978200), (2, 10989100), (4, 5494550), (5, 4395640), (8, 2747275), (10, 2197820), (20, 1098910), (25, 879128), (40, 549455), (50, 439564), (100, 219782), (200, 109891)]