21051813

素因数分解:

$3^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1\times {\mathrm{991}}^1$

素因数の和:1164

約数の個数: 16

約数和(自身を含む): 28775936

約数和(自身を除く): 7724123

約数列:

[1, 3, 73, 97, 219, 291, 991, 2973, 7081, 21243, 72343, 96127, 217029, 288381, 7017271, 21051813]

約数ペア:

[(1, 21051813), (3, 7017271), (73, 288381), (97, 217029), (219, 96127), (291, 72343), (991, 21243), (2973, 7081)]