20445680

素因数分解:

$2^4\times 5^1\times {\mathrm{255571}}^1$

素因数の和:255584

約数の個数: 20

約数和(自身を含む): 47536392

約数和(自身を除く): 27090712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255571, 511142, 1022284, 1277855, 2044568, 2555710, 4089136, 5111420, 10222840, 20445680]

約数ペア:

[(1, 20445680), (2, 10222840), (4, 5111420), (5, 4089136), (8, 2555710), (10, 2044568), (16, 1277855), (20, 1022284), (40, 511142), (80, 255571)]