20745865

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^2\times {\mathrm{293}}^1$

素因数の和:346

約数の個数: 36

約数和(自身を含む): 30868236

約数和(自身を除く): 10122371

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 289, 293, 595, 833, 1445, 1465, 2023, 2051, 4165, 4981, 10115, 10255, 14161, 14357, 24905, 34867, 70805, 71785, 84677, 174335, 244069, 423385, 592739, 1220345, 2963695, 4149173, 20745865]

約数ペア:

[(1, 20745865), (5, 4149173), (7, 2963695), (17, 1220345), (35, 592739), (49, 423385), (85, 244069), (119, 174335), (245, 84677), (289, 71785), (293, 70805), (595, 34867), (833, 24905), (1445, 14357), (1465, 14161), (2023, 10255), (2051, 10115), (4165, 4981)]