20899280

素因数分解:

$2^4\times 5^1\times {\mathrm{261241}}^1$

素因数の和:261254

約数の個数: 20

約数和(自身を含む): 48591012

約数和(自身を除く): 27691732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261241, 522482, 1044964, 1306205, 2089928, 2612410, 4179856, 5224820, 10449640, 20899280]

約数ペア:

[(1, 20899280), (2, 10449640), (4, 5224820), (5, 4179856), (8, 2612410), (10, 2089928), (16, 1306205), (20, 1044964), (40, 522482), (80, 261241)]