21426575

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:323

約数の個数: 24

約数和(自身を含む): 27507168

約数和(自身を除く): 6080593

約数列:

[1, 5, 25, 53, 103, 157, 265, 515, 785, 1325, 2575, 3925, 5459, 8321, 16171, 27295, 41605, 80855, 136475, 208025, 404275, 857063, 4285315, 21426575]

約数ペア:

[(1, 21426575), (5, 4285315), (25, 857063), (53, 404275), (103, 208025), (157, 136475), (265, 80855), (515, 41605), (785, 27295), (1325, 16171), (2575, 8321), (3925, 5459)]