21512225

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1033}}^1$

素因数の和:1074

約数の個数: 36

約数和(自身を含む): 32887404

約数和(自身を除く): 11375179

約数列:

[1, 5, 7, 17, 25, 35, 49, 85, 119, 175, 245, 425, 595, 833, 1033, 1225, 2975, 4165, 5165, 7231, 17561, 20825, 25825, 36155, 50617, 87805, 122927, 180775, 253085, 439025, 614635, 860489, 1265425, 3073175, 4302445, 21512225]

約数ペア:

[(1, 21512225), (5, 4302445), (7, 3073175), (17, 1265425), (25, 860489), (35, 614635), (49, 439025), (85, 253085), (119, 180775), (175, 122927), (245, 87805), (425, 50617), (595, 36155), (833, 25825), (1033, 20825), (1225, 17561), (2975, 7231), (4165, 5165)]