21347963

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12347}}^1$

素因数の和:12386

約数の個数: 16

約数和(自身を含む): 27659520

約数和(自身を除く): 6311557

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12347, 86429, 160511, 234593, 1123577, 1642151, 3049709, 21347963]

約数ペア:

[(1, 21347963), (7, 3049709), (13, 1642151), (19, 1123577), (91, 234593), (133, 160511), (247, 86429), (1729, 12347)]