28244080

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 68745600

約数和(自身を除く): 40501520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 79, 80, 82, 109, 158, 164, 205, 218, 316, 328, 395, 410, 436, 545, 632, 656, 790, 820, 872, 1090, 1264, 1580, 1640, 1744, 2180, 3160, 3239, 3280, 4360, 4469, 6320, 6478, 8611, 8720, 8938, 12956, 16195, 17222, 17876, 22345, 25912, 32390, 34444, 35752, 43055, 44690, 51824, 64780, 68888, 71504, 86110, 89380, 129560, 137776, 172220, 178760, 259120, 344440, 353051, 357520, 688880, 706102, 1412204, 1765255, 2824408, 3530510, 5648816, 7061020, 14122040, 28244080]

約数ペア:

[(1, 28244080), (2, 14122040), (4, 7061020), (5, 5648816), (8, 3530510), (10, 2824408), (16, 1765255), (20, 1412204), (40, 706102), (41, 688880), (79, 357520), (80, 353051), (82, 344440), (109, 259120), (158, 178760), (164, 172220), (205, 137776), (218, 129560), (316, 89380), (328, 86110), (395, 71504), (410, 68888), (436, 64780), (545, 51824), (632, 44690), (656, 43055), (790, 35752), (820, 34444), (872, 32390), (1090, 25912), (1264, 22345), (1580, 17876), (1640, 17222), (1744, 16195), (2180, 12956), (3160, 8938), (3239, 8720), (3280, 8611), (4360, 6478), (4469, 6320)]