21338079

素因数分解:

$3^1\times 7^2\times {\mathrm{379}}^1\times {\mathrm{383}}^1$

素因数の和:779

約数の個数: 24

約数和(自身を含む): 33269760

約数和(自身を除く): 11931681

約数列:

[1, 3, 7, 21, 49, 147, 379, 383, 1137, 1149, 2653, 2681, 7959, 8043, 18571, 18767, 55713, 56301, 145157, 435471, 1016099, 3048297, 7112693, 21338079]

約数ペア:

[(1, 21338079), (3, 7112693), (7, 3048297), (21, 1016099), (49, 435471), (147, 145157), (379, 56301), (383, 55713), (1137, 18767), (1149, 18571), (2653, 8043), (2681, 7959)]