19219420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{439}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 44352000

約数和(自身を除く): 25132580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 439, 796, 878, 995, 1756, 1990, 2189, 2195, 3980, 4378, 4390, 4829, 8756, 8780, 9658, 10945, 19316, 21890, 24145, 43780, 48290, 87361, 96580, 174722, 349444, 436805, 873610, 960971, 1747220, 1921942, 3843884, 4804855, 9609710, 19219420]

約数ペア:

[(1, 19219420), (2, 9609710), (4, 4804855), (5, 3843884), (10, 1921942), (11, 1747220), (20, 960971), (22, 873610), (44, 436805), (55, 349444), (110, 174722), (199, 96580), (220, 87361), (398, 48290), (439, 43780), (796, 24145), (878, 21890), (995, 19316), (1756, 10945), (1990, 9658), (2189, 8780), (2195, 8756), (3980, 4829), (4378, 4390)]