21288321

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{853}}^1$

素因数の和:965

約数の個数: 24

約数和(自身を含む): 31973760

約数和(自身を除く): 10685439

約数列:

[1, 3, 9, 47, 59, 141, 177, 423, 531, 853, 2559, 2773, 7677, 8319, 24957, 40091, 50327, 120273, 150981, 360819, 452943, 2365369, 7096107, 21288321]

約数ペア:

[(1, 21288321), (3, 7096107), (9, 2365369), (47, 452943), (59, 360819), (141, 150981), (177, 120273), (423, 50327), (531, 40091), (853, 24957), (2559, 8319), (2773, 7677)]