28756455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{21067}}^1$

素因数の和:21095

約数の個数: 32

約数和(自身を含む): 56630784

約数和(自身を除く): 27874329

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 21067, 63201, 105335, 147469, 273871, 316005, 442407, 737345, 821613, 1369355, 1917097, 2212035, 4108065, 5751291, 9585485, 28756455]

約数ペア:

[(1, 28756455), (3, 9585485), (5, 5751291), (7, 4108065), (13, 2212035), (15, 1917097), (21, 1369355), (35, 821613), (39, 737345), (65, 442407), (91, 316005), (105, 273871), (195, 147469), (273, 105335), (455, 63201), (1365, 21067)]