21103953

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{229}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 32457600

約数和(自身を除く): 11353647

約数列:

[1, 3, 13, 17, 39, 51, 139, 221, 229, 417, 663, 687, 1807, 2363, 2977, 3893, 5421, 7089, 8931, 11679, 30719, 31831, 50609, 92157, 95493, 151827, 413803, 541127, 1241409, 1623381, 7034651, 21103953]

約数ペア:

[(1, 21103953), (3, 7034651), (13, 1623381), (17, 1241409), (39, 541127), (51, 413803), (139, 151827), (221, 95493), (229, 92157), (417, 50609), (663, 31831), (687, 30719), (1807, 11679), (2363, 8931), (2977, 7089), (3893, 5421)]