21412475

素因数分解:

$5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{3947}}^1$

素因数の和:3995

約数の個数: 24

約数和(自身を含む): 31331328

約数和(自身を除く): 9918853

約数列:

[1, 5, 7, 25, 31, 35, 155, 175, 217, 775, 1085, 3947, 5425, 19735, 27629, 98675, 122357, 138145, 611785, 690725, 856499, 3058925, 4282495, 21412475]

約数ペア:

[(1, 21412475), (5, 4282495), (7, 3058925), (25, 856499), (31, 690725), (35, 611785), (155, 138145), (175, 122357), (217, 98675), (775, 27629), (1085, 19735), (3947, 5425)]