28520805

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{229}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 50474880

約数和(自身を除く): 21954075

約数列:

[1, 3, 5, 15, 19, 23, 57, 69, 95, 115, 229, 285, 345, 361, 437, 687, 1083, 1145, 1311, 1805, 2185, 3435, 4351, 5267, 5415, 6555, 8303, 13053, 15801, 21755, 24909, 26335, 41515, 65265, 79005, 82669, 100073, 124545, 248007, 300219, 413345, 500365, 1240035, 1501095, 1901387, 5704161, 9506935, 28520805]

約数ペア:

[(1, 28520805), (3, 9506935), (5, 5704161), (15, 1901387), (19, 1501095), (23, 1240035), (57, 500365), (69, 413345), (95, 300219), (115, 248007), (229, 124545), (285, 100073), (345, 82669), (361, 79005), (437, 65265), (687, 41515), (1083, 26335), (1145, 24909), (1311, 21755), (1805, 15801), (2185, 13053), (3435, 8303), (4351, 6555), (5267, 5415)]