21278733

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{21559}}^1$

素因数の和:21616

約数の個数: 16

約数和(自身を含む): 33116160

約数和(自身を除く): 11837427

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 21559, 64677, 150913, 452739, 1013273, 3039819, 7092911, 21278733]

約数ペア:

[(1, 21278733), (3, 7092911), (7, 3039819), (21, 1013273), (47, 452739), (141, 150913), (329, 64677), (987, 21559)]