19525880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:444

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 28858120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 199, 220, 223, 398, 440, 446, 796, 892, 995, 1115, 1592, 1784, 1990, 2189, 2230, 2453, 3980, 4378, 4460, 4906, 7960, 8756, 8920, 9812, 10945, 12265, 17512, 19624, 21890, 24530, 43780, 44377, 49060, 87560, 88754, 98120, 177508, 221885, 355016, 443770, 488147, 887540, 976294, 1775080, 1952588, 2440735, 3905176, 4881470, 9762940, 19525880]

約数ペア:

[(1, 19525880), (2, 9762940), (4, 4881470), (5, 3905176), (8, 2440735), (10, 1952588), (11, 1775080), (20, 976294), (22, 887540), (40, 488147), (44, 443770), (55, 355016), (88, 221885), (110, 177508), (199, 98120), (220, 88754), (223, 87560), (398, 49060), (440, 44377), (446, 43780), (796, 24530), (892, 21890), (995, 19624), (1115, 17512), (1592, 12265), (1784, 10945), (1990, 9812), (2189, 8920), (2230, 8756), (2453, 7960), (3980, 4906), (4378, 4460)]