20397225

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^2\times {\mathrm{283}}^1$

素因数の和:358

約数の個数: 36

約数和(自身を含む): 34969488

約数和(自身を除く): 14572263

約数列:

[1, 3, 5, 15, 25, 31, 75, 93, 155, 283, 465, 775, 849, 961, 1415, 2325, 2883, 4245, 4805, 7075, 8773, 14415, 21225, 24025, 26319, 43865, 72075, 131595, 219325, 271963, 657975, 815889, 1359815, 4079445, 6799075, 20397225]

約数ペア:

[(1, 20397225), (3, 6799075), (5, 4079445), (15, 1359815), (25, 815889), (31, 657975), (75, 271963), (93, 219325), (155, 131595), (283, 72075), (465, 43865), (775, 26319), (849, 24025), (961, 21225), (1415, 14415), (2325, 8773), (2883, 7075), (4245, 4805)]