21700240

素因数分解:

$2^4\times 5^1\times {\mathrm{271253}}^1$

素因数の和:271266

約数の個数: 20

約数和(自身を含む): 50453244

約数和(自身を除く): 28753004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271253, 542506, 1085012, 1356265, 2170024, 2712530, 4340048, 5425060, 10850120, 21700240]

約数ペア:

[(1, 21700240), (2, 10850120), (4, 5425060), (5, 4340048), (8, 2712530), (10, 2170024), (16, 1356265), (20, 1085012), (40, 542506), (80, 271253)]