20495120

素因数分解:

$2^4\times 5^1\times {\mathrm{256189}}^1$

素因数の和:256202

約数の個数: 20

約数和(自身を含む): 47651340

約数和(自身を除く): 27156220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256189, 512378, 1024756, 1280945, 2049512, 2561890, 4099024, 5123780, 10247560, 20495120]

約数ペア:

[(1, 20495120), (2, 10247560), (4, 5123780), (5, 4099024), (8, 2561890), (10, 2049512), (16, 1280945), (20, 1024756), (40, 512378), (80, 256189)]