81587405

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^2\times {\mathrm{157}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 103136712

約数和(自身を除く): 21549307

約数列:

[1, 5, 37, 53, 157, 185, 265, 785, 1961, 2809, 5809, 8321, 9805, 14045, 29045, 41605, 103933, 307877, 441013, 519665, 1539385, 2205065, 16317481, 81587405]

約数ペア:

[(1, 81587405), (5, 16317481), (37, 2205065), (53, 1539385), (157, 519665), (185, 441013), (265, 307877), (785, 103933), (1961, 41605), (2809, 29045), (5809, 14045), (8321, 9805)]