20290557

素因数分解:

$3^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{1423}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 31817856

約数和(自身を除く): 11527299

約数列:

[1, 3, 7, 21, 49, 97, 147, 291, 679, 1423, 2037, 4269, 4753, 9961, 14259, 29883, 69727, 138031, 209181, 414093, 966217, 2898651, 6763519, 20290557]

約数ペア:

[(1, 20290557), (3, 6763519), (7, 2898651), (21, 966217), (49, 414093), (97, 209181), (147, 138031), (291, 69727), (679, 29883), (1423, 14259), (2037, 9961), (4269, 4753)]