21279591

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{9059}}^1$

素因数の和:9100

約数の個数: 20

約数和(自身を含む): 32887800

約数和(自身を除く): 11608209

約数列:

[1, 3, 9, 27, 29, 81, 87, 261, 783, 2349, 9059, 27177, 81531, 244593, 262711, 733779, 788133, 2364399, 7093197, 21279591]

約数ペア:

[(1, 21279591), (3, 7093197), (9, 2364399), (27, 788133), (29, 733779), (81, 262711), (87, 244593), (261, 81531), (783, 27177), (2349, 9059)]