20525855

素因数分解:

$5^1\times 7^2\times {\mathrm{199}}^1\times {\mathrm{421}}^1$

素因数の和:639

約数の個数: 24

約数和(自身を含む): 28864800

約数和(自身を除く): 8338945

約数列:

[1, 5, 7, 35, 49, 199, 245, 421, 995, 1393, 2105, 2947, 6965, 9751, 14735, 20629, 48755, 83779, 103145, 418895, 586453, 2932265, 4105171, 20525855]

約数ペア:

[(1, 20525855), (5, 4105171), (7, 2932265), (35, 586453), (49, 418895), (199, 103145), (245, 83779), (421, 48755), (995, 20629), (1393, 14735), (2105, 9751), (2947, 6965)]