28907120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{307}}^1$

素因数の和:438

約数の個数: 80

約数和(自身を含む): 74245248

約数和(自身を除く): 45338128

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 107, 110, 176, 214, 220, 307, 428, 440, 535, 614, 856, 880, 1070, 1177, 1228, 1535, 1712, 2140, 2354, 2456, 3070, 3377, 4280, 4708, 4912, 5885, 6140, 6754, 8560, 9416, 11770, 12280, 13508, 16885, 18832, 23540, 24560, 27016, 32849, 33770, 47080, 54032, 65698, 67540, 94160, 131396, 135080, 164245, 262792, 270160, 328490, 361339, 525584, 656980, 722678, 1313960, 1445356, 1806695, 2627920, 2890712, 3613390, 5781424, 7226780, 14453560, 28907120]

約数ペア:

[(1, 28907120), (2, 14453560), (4, 7226780), (5, 5781424), (8, 3613390), (10, 2890712), (11, 2627920), (16, 1806695), (20, 1445356), (22, 1313960), (40, 722678), (44, 656980), (55, 525584), (80, 361339), (88, 328490), (107, 270160), (110, 262792), (176, 164245), (214, 135080), (220, 131396), (307, 94160), (428, 67540), (440, 65698), (535, 54032), (614, 47080), (856, 33770), (880, 32849), (1070, 27016), (1177, 24560), (1228, 23540), (1535, 18832), (1712, 16885), (2140, 13508), (2354, 12280), (2456, 11770), (3070, 9416), (3377, 8560), (4280, 6754), (4708, 6140), (4912, 5885)]