21155331

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{3881}}^1$

素因数の和:3986

約数の個数: 16

約数和(自身を含む): 29813760

約数和(自身を除く): 8658429

約数列:

[1, 3, 23, 69, 79, 237, 1817, 3881, 5451, 11643, 89263, 267789, 306599, 919797, 7051777, 21155331]

約数ペア:

[(1, 21155331), (3, 7051777), (23, 919797), (69, 306599), (79, 267789), (237, 89263), (1817, 11643), (3881, 5451)]