21928011

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{257}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 35665920

約数和(自身を除く): 13737909

約数列:

[1, 3, 7, 17, 21, 51, 119, 239, 257, 357, 717, 771, 1673, 1799, 4063, 4369, 5019, 5397, 12189, 13107, 28441, 30583, 61423, 85323, 91749, 184269, 429961, 1044191, 1289883, 3132573, 7309337, 21928011]

約数ペア:

[(1, 21928011), (3, 7309337), (7, 3132573), (17, 1289883), (21, 1044191), (51, 429961), (119, 184269), (239, 91749), (257, 85323), (357, 61423), (717, 30583), (771, 28441), (1673, 13107), (1799, 12189), (4063, 5397), (4369, 5019)]