21383739

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{827}}^1$

素因数の和:876

約数の個数: 36

約数和(自身を含む): 35456616

約数和(自身を除く): 14072877

約数列:

[1, 3, 9, 13, 17, 39, 51, 117, 153, 169, 221, 507, 663, 827, 1521, 1989, 2481, 2873, 7443, 8619, 10751, 14059, 25857, 32253, 42177, 96759, 126531, 139763, 182767, 419289, 548301, 1257867, 1644903, 2375971, 7127913, 21383739]

約数ペア:

[(1, 21383739), (3, 7127913), (9, 2375971), (13, 1644903), (17, 1257867), (39, 548301), (51, 419289), (117, 182767), (153, 139763), (169, 126531), (221, 96759), (507, 42177), (663, 32253), (827, 25857), (1521, 14059), (1989, 10751), (2481, 8619), (2873, 7443)]