21124929

素因数分解:

$3^1\times 7^2\times {\mathrm{131}}^1\times {\mathrm{1097}}^1$

素因数の和:1245

約数の個数: 24

約数和(自身を含む): 33045408

約数和(自身を除く): 11920479

約数列:

[1, 3, 7, 21, 49, 131, 147, 393, 917, 1097, 2751, 3291, 6419, 7679, 19257, 23037, 53753, 143707, 161259, 431121, 1005949, 3017847, 7041643, 21124929]

約数ペア:

[(1, 21124929), (3, 7041643), (7, 3017847), (21, 1005949), (49, 431121), (131, 161259), (147, 143707), (393, 53753), (917, 23037), (1097, 19257), (2751, 7679), (3291, 6419)]