19880918560

素因数分解:

$2^5\times 5^1\times {\mathrm{443}}^1\times {\mathrm{280487}}^1$

素因数の和:280945

約数の個数: 48

約数和(自身を含む): 47074862016

約数和(自身を除く): 27193943456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 443, 886, 1772, 2215, 3544, 4430, 7088, 8860, 14176, 17720, 35440, 70880, 280487, 560974, 1121948, 1402435, 2243896, 2804870, 4487792, 5609740, 8975584, 11219480, 22438960, 44877920, 124255741, 248511482, 497022964, 621278705, 994045928, 1242557410, 1988091856, 2485114820, 3976183712, 4970229640, 9940459280, 19880918560]

約数ペア:

[(1, 19880918560), (2, 9940459280), (4, 4970229640), (5, 3976183712), (8, 2485114820), (10, 1988091856), (16, 1242557410), (20, 994045928), (32, 621278705), (40, 497022964), (80, 248511482), (160, 124255741), (443, 44877920), (886, 22438960), (1772, 11219480), (2215, 8975584), (3544, 5609740), (4430, 4487792), (7088, 2804870), (8860, 2243896), (14176, 1402435), (17720, 1121948), (35440, 560974), (70880, 280487)]