15221997

素因数分解:

$3^2\times 7^3\times {\mathrm{4931}}^1$

素因数の和:4958

約数の個数: 24

約数和(自身を含む): 25646400

約数和(自身を除く): 10424403

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 4931, 14793, 34517, 44379, 103551, 241619, 310653, 724857, 1691333, 2174571, 5073999, 15221997]

約数ペア:

[(1, 15221997), (3, 5073999), (7, 2174571), (9, 1691333), (21, 724857), (49, 310653), (63, 241619), (147, 103551), (343, 44379), (441, 34517), (1029, 14793), (3087, 4931)]