21288245

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 29082240

約数和(自身を除く): 7793995

約数列:

[1, 5, 11, 53, 55, 67, 109, 265, 335, 545, 583, 737, 1199, 2915, 3551, 3685, 5777, 5995, 7303, 17755, 28885, 36515, 39061, 63547, 80333, 195305, 317735, 387059, 401665, 1935295, 4257649, 21288245]

約数ペア:

[(1, 21288245), (5, 4257649), (11, 1935295), (53, 401665), (55, 387059), (67, 317735), (109, 195305), (265, 80333), (335, 63547), (545, 39061), (583, 36515), (737, 28885), (1199, 17755), (2915, 7303), (3551, 5995), (3685, 5777)]