21747765

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{373}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 39422592

約数和(自身を除く): 17674827

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 169, 195, 299, 345, 373, 507, 845, 897, 1119, 1495, 1865, 2535, 3887, 4485, 4849, 5595, 8579, 11661, 14547, 19435, 24245, 25737, 42895, 58305, 63037, 72735, 111527, 128685, 189111, 315185, 334581, 557635, 945555, 1449851, 1672905, 4349553, 7249255, 21747765]

約数ペア:

[(1, 21747765), (3, 7249255), (5, 4349553), (13, 1672905), (15, 1449851), (23, 945555), (39, 557635), (65, 334581), (69, 315185), (115, 189111), (169, 128685), (195, 111527), (299, 72735), (345, 63037), (373, 58305), (507, 42895), (845, 25737), (897, 24245), (1119, 19435), (1495, 14547), (1865, 11661), (2535, 8579), (3887, 5595), (4485, 4849)]