21278631

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{15727}}^1$

素因数の和:15782

約数の個数: 16

約数和(自身を含む): 31707648

約数和(自身を除く): 10429017

約数列:

[1, 3, 11, 33, 41, 123, 451, 1353, 15727, 47181, 172997, 518991, 644807, 1934421, 7092877, 21278631]

約数ペア:

[(1, 21278631), (3, 7092877), (11, 1934421), (33, 644807), (41, 518991), (123, 172997), (451, 47181), (1353, 15727)]