21655179

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{193}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 38980032

約数和(自身を除く): 17324853

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 137, 193, 273, 411, 579, 819, 959, 1233, 1351, 1737, 1781, 2509, 2877, 4053, 5343, 7527, 8631, 12159, 12467, 16029, 17563, 22581, 26441, 37401, 52689, 79323, 112203, 158067, 185087, 237969, 343733, 555261, 1031199, 1665783, 2406131, 3093597, 7218393, 21655179]

約数ペア:

[(1, 21655179), (3, 7218393), (7, 3093597), (9, 2406131), (13, 1665783), (21, 1031199), (39, 555261), (63, 343733), (91, 237969), (117, 185087), (137, 158067), (193, 112203), (273, 79323), (411, 52689), (579, 37401), (819, 26441), (959, 22581), (1233, 17563), (1351, 16029), (1737, 12467), (1781, 12159), (2509, 8631), (2877, 7527), (4053, 5343)]