21088075

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^2\times {\mathrm{59}}^1$

素因数の和:144

約数の個数: 36

約数和(自身を含む): 29161080

約数和(自身を除く): 8073005

約数列:

[1, 5, 17, 25, 29, 59, 85, 145, 295, 425, 493, 725, 841, 1003, 1475, 1711, 2465, 4205, 5015, 8555, 12325, 14297, 21025, 25075, 29087, 42775, 49619, 71485, 145435, 248095, 357425, 727175, 843523, 1240475, 4217615, 21088075]

約数ペア:

[(1, 21088075), (5, 4217615), (17, 1240475), (25, 843523), (29, 727175), (59, 357425), (85, 248095), (145, 145435), (295, 71485), (425, 49619), (493, 42775), (725, 29087), (841, 25075), (1003, 21025), (1475, 14297), (1711, 12325), (2465, 8555), (4205, 5015)]