20517140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1451}}^1$

素因数の和:1568

約数の個数: 48

約数和(自身を含む): 49762944

約数和(自身を除く): 29245804

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1451, 2020, 2828, 2902, 3535, 5804, 7070, 7255, 10157, 14140, 14510, 20314, 29020, 40628, 50785, 101570, 146551, 203140, 293102, 586204, 732755, 1025857, 1465510, 2051714, 2931020, 4103428, 5129285, 10258570, 20517140]

約数ペア:

[(1, 20517140), (2, 10258570), (4, 5129285), (5, 4103428), (7, 2931020), (10, 2051714), (14, 1465510), (20, 1025857), (28, 732755), (35, 586204), (70, 293102), (101, 203140), (140, 146551), (202, 101570), (404, 50785), (505, 40628), (707, 29020), (1010, 20314), (1414, 14510), (1451, 14140), (2020, 10157), (2828, 7255), (2902, 7070), (3535, 5804)]