28074040

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 65577600

約数和(自身を除く): 37503560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 109, 137, 188, 218, 235, 274, 376, 436, 470, 545, 548, 685, 872, 940, 1090, 1096, 1370, 1880, 2180, 2740, 4360, 5123, 5480, 6439, 10246, 12878, 14933, 20492, 25615, 25756, 29866, 32195, 40984, 51230, 51512, 59732, 64390, 74665, 102460, 119464, 128780, 149330, 204920, 257560, 298660, 597320, 701851, 1403702, 2807404, 3509255, 5614808, 7018510, 14037020, 28074040]

約数ペア:

[(1, 28074040), (2, 14037020), (4, 7018510), (5, 5614808), (8, 3509255), (10, 2807404), (20, 1403702), (40, 701851), (47, 597320), (94, 298660), (109, 257560), (137, 204920), (188, 149330), (218, 128780), (235, 119464), (274, 102460), (376, 74665), (436, 64390), (470, 59732), (545, 51512), (548, 51230), (685, 40984), (872, 32195), (940, 29866), (1090, 25756), (1096, 25615), (1370, 20492), (1880, 14933), (2180, 12878), (2740, 10246), (4360, 6439), (5123, 5480)]