221499280

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{19919}}^1$

素因数の和:20071

約数の個数: 40

約数和(自身を含む): 518716800

約数和(自身を除く): 297217520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 2224, 2780, 5560, 11120, 19919, 39838, 79676, 99595, 159352, 199190, 318704, 398380, 796760, 1593520, 2768741, 5537482, 11074964, 13843705, 22149928, 27687410, 44299856, 55374820, 110749640, 221499280]

約数ペア:

[(1, 221499280), (2, 110749640), (4, 55374820), (5, 44299856), (8, 27687410), (10, 22149928), (16, 13843705), (20, 11074964), (40, 5537482), (80, 2768741), (139, 1593520), (278, 796760), (556, 398380), (695, 318704), (1112, 199190), (1390, 159352), (2224, 99595), (2780, 79676), (5560, 39838), (11120, 19919)]