21700245

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{12157}}^1$

素因数の和:12189

約数の個数: 32

約数和(自身を含む): 42018048

約数和(自身を除く): 20317803

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 12157, 36471, 60785, 85099, 182355, 206669, 255297, 425495, 620007, 1033345, 1276485, 1446683, 3100035, 4340049, 7233415, 21700245]

約数ペア:

[(1, 21700245), (3, 7233415), (5, 4340049), (7, 3100035), (15, 1446683), (17, 1276485), (21, 1033345), (35, 620007), (51, 425495), (85, 255297), (105, 206669), (119, 182355), (255, 85099), (357, 60785), (595, 36471), (1785, 12157)]