20212575

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 35997696

約数和(自身を除く): 15785121

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 83, 85, 191, 249, 255, 415, 425, 573, 955, 1245, 1275, 1411, 2075, 2865, 3247, 4233, 4775, 6225, 7055, 9741, 14325, 15853, 16235, 21165, 35275, 47559, 48705, 79265, 81175, 105825, 237795, 243525, 269501, 396325, 808503, 1188975, 1347505, 4042515, 6737525, 20212575]

約数ペア:

[(1, 20212575), (3, 6737525), (5, 4042515), (15, 1347505), (17, 1188975), (25, 808503), (51, 396325), (75, 269501), (83, 243525), (85, 237795), (191, 105825), (249, 81175), (255, 79265), (415, 48705), (425, 47559), (573, 35275), (955, 21165), (1245, 16235), (1275, 15853), (1411, 14325), (2075, 9741), (2865, 7055), (3247, 6225), (4233, 4775)]