28911080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{65707}}^1$

素因数の和:65729

約数の個数: 32

約数和(自身を含む): 70964640

約数和(自身を除く): 42053560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 65707, 131414, 262828, 328535, 525656, 657070, 722777, 1314140, 1445554, 2628280, 2891108, 3613885, 5782216, 7227770, 14455540, 28911080]

約数ペア:

[(1, 28911080), (2, 14455540), (4, 7227770), (5, 5782216), (8, 3613885), (10, 2891108), (11, 2628280), (20, 1445554), (22, 1314140), (40, 722777), (44, 657070), (55, 525656), (88, 328535), (110, 262828), (220, 131414), (440, 65707)]