21242151

素因数分解:

$3^2\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1949}}^1$

素因数の和:2135

約数の個数: 24

約数和(自身を含む): 35287200

約数和(自身を除く): 14045049

約数列:

[1, 3, 7, 9, 21, 63, 173, 519, 1211, 1557, 1949, 3633, 5847, 10899, 13643, 17541, 40929, 122787, 337177, 1011531, 2360239, 3034593, 7080717, 21242151]

約数ペア:

[(1, 21242151), (3, 7080717), (7, 3034593), (9, 2360239), (21, 1011531), (63, 337177), (173, 122787), (519, 40929), (1211, 17541), (1557, 13643), (1949, 10899), (3633, 5847)]