20975185

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 32864832

約数和(自身を除く): 11889647

約数列:

[1, 5, 7, 11, 35, 43, 49, 55, 77, 181, 215, 245, 301, 385, 473, 539, 905, 1267, 1505, 1991, 2107, 2365, 2695, 3311, 6335, 7783, 8869, 9955, 10535, 13937, 16555, 23177, 38915, 44345, 54481, 69685, 85613, 97559, 115885, 272405, 381367, 428065, 487795, 599291, 1906835, 2996455, 4195037, 20975185]

約数ペア:

[(1, 20975185), (5, 4195037), (7, 2996455), (11, 1906835), (35, 599291), (43, 487795), (49, 428065), (55, 381367), (77, 272405), (181, 115885), (215, 97559), (245, 85613), (301, 69685), (385, 54481), (473, 44345), (539, 38915), (905, 23177), (1267, 16555), (1505, 13937), (1991, 10535), (2107, 9955), (2365, 8869), (2695, 7783), (3311, 6335)]