20259981

素因数分解:

$3^2\times 7^3\times {\mathrm{6563}}^1$

素因数の和:6590

約数の個数: 24

約数和(自身を含む): 34132800

約数和(自身を除く): 13872819

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 6563, 19689, 45941, 59067, 137823, 321587, 413469, 964761, 2251109, 2894283, 6753327, 20259981]

約数ペア:

[(1, 20259981), (3, 6753327), (7, 2894283), (9, 2251109), (21, 964761), (49, 413469), (63, 321587), (147, 137823), (343, 59067), (441, 45941), (1029, 19689), (3087, 6563)]