21465815

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{839}}^1$

素因数の和:911

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10467625

約数列:

[1, 5, 7, 17, 35, 43, 85, 119, 215, 301, 595, 731, 839, 1505, 3655, 4195, 5117, 5873, 14263, 25585, 29365, 36077, 71315, 99841, 180385, 252539, 499205, 613309, 1262695, 3066545, 4293163, 21465815]

約数ペア:

[(1, 21465815), (5, 4293163), (7, 3066545), (17, 1262695), (35, 613309), (43, 499205), (85, 252539), (119, 180385), (215, 99841), (301, 71315), (595, 36077), (731, 29365), (839, 25585), (1505, 14263), (3655, 5873), (4195, 5117)]