20397575

素因数分解:

$5^2\times {\mathrm{11}}^3\times {\mathrm{613}}^1$

素因数の和:656

約数の個数: 24

約数和(自身を含む): 27865776

約数和(自身を除く): 7468201

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 613, 1331, 3025, 3065, 6655, 6743, 15325, 33275, 33715, 74173, 168575, 370865, 815903, 1854325, 4079515, 20397575]

約数ペア:

[(1, 20397575), (5, 4079515), (11, 1854325), (25, 815903), (55, 370865), (121, 168575), (275, 74173), (605, 33715), (613, 33275), (1331, 15325), (3025, 6743), (3065, 6655)]