21491525

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{2521}}^1$

素因数の和:2573

約数の個数: 24

約数和(自身を含む): 30021888

約数和(自身を除く): 8530363

約数列:

[1, 5, 11, 25, 31, 55, 155, 275, 341, 775, 1705, 2521, 8525, 12605, 27731, 63025, 78151, 138655, 390755, 693275, 859661, 1953775, 4298305, 21491525]

約数ペア:

[(1, 21491525), (5, 4298305), (11, 1953775), (25, 859661), (31, 693275), (55, 390755), (155, 138655), (275, 78151), (341, 63025), (775, 27731), (1705, 12605), (2521, 8525)]