21647655

素因数分解:

$3^6\times 5^1\times {\mathrm{5939}}^1$

素因数の和:5962

約数の個数: 28

約数和(自身を含む): 38954520

約数和(自身を除く): 17306865

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5939, 17817, 29695, 53451, 89085, 160353, 267255, 481059, 801765, 1443177, 2405295, 4329531, 7215885, 21647655]

約数ペア:

[(1, 21647655), (3, 7215885), (5, 4329531), (9, 2405295), (15, 1443177), (27, 801765), (45, 481059), (81, 267255), (135, 160353), (243, 89085), (405, 53451), (729, 29695), (1215, 17817), (3645, 5939)]