21675080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{389}}^1$

素因数の和:606

約数の個数: 64

約数和(自身を含む): 56160000

約数和(自身を除く): 34484920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 199, 280, 389, 398, 778, 796, 995, 1393, 1556, 1592, 1945, 1990, 2723, 2786, 3112, 3890, 3980, 5446, 5572, 6965, 7780, 7960, 10892, 11144, 13615, 13930, 15560, 21784, 27230, 27860, 54460, 55720, 77411, 108920, 154822, 309644, 387055, 541877, 619288, 774110, 1083754, 1548220, 2167508, 2709385, 3096440, 4335016, 5418770, 10837540, 21675080]

約数ペア:

[(1, 21675080), (2, 10837540), (4, 5418770), (5, 4335016), (7, 3096440), (8, 2709385), (10, 2167508), (14, 1548220), (20, 1083754), (28, 774110), (35, 619288), (40, 541877), (56, 387055), (70, 309644), (140, 154822), (199, 108920), (280, 77411), (389, 55720), (398, 54460), (778, 27860), (796, 27230), (995, 21784), (1393, 15560), (1556, 13930), (1592, 13615), (1945, 11144), (1990, 10892), (2723, 7960), (2786, 7780), (3112, 6965), (3890, 5572), (3980, 5446)]