21390663

素因数分解:

$3^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{5333}}^1$

素因数の和:5534

約数の個数: 16

約数和(自身を含む): 32772096

約数和(自身を除く): 11381433

約数列:

[1, 3, 7, 21, 191, 573, 1337, 4011, 5333, 15999, 37331, 111993, 1018603, 3055809, 7130221, 21390663]

約数ペア:

[(1, 21390663), (3, 7130221), (7, 3055809), (21, 1018603), (191, 111993), (573, 37331), (1337, 15999), (4011, 5333)]