21434427

素因数分解:

$3^2\times 7^1\times {\mathrm{397}}^1\times {\mathrm{857}}^1$

素因数の和:1267

約数の個数: 24

約数和(自身を含む): 35514336

約数和(自身を除く): 14079909

約数列:

[1, 3, 7, 9, 21, 63, 397, 857, 1191, 2571, 2779, 3573, 5999, 7713, 8337, 17997, 25011, 53991, 340229, 1020687, 2381603, 3062061, 7144809, 21434427]

約数ペア:

[(1, 21434427), (3, 7144809), (7, 3062061), (9, 2381603), (21, 1020687), (63, 340229), (397, 53991), (857, 25011), (1191, 17997), (2571, 8337), (2779, 7713), (3573, 5999)]