19992080

素因数分解:

$2^4\times 5^1\times {\mathrm{269}}^1\times {\mathrm{929}}^1$

素因数の和:1211

約数の個数: 40

約数和(自身を含む): 46704600

約数和(自身を除く): 26712520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 269, 538, 929, 1076, 1345, 1858, 2152, 2690, 3716, 4304, 4645, 5380, 7432, 9290, 10760, 14864, 18580, 21520, 37160, 74320, 249901, 499802, 999604, 1249505, 1999208, 2499010, 3998416, 4998020, 9996040, 19992080]

約数ペア:

[(1, 19992080), (2, 9996040), (4, 4998020), (5, 3998416), (8, 2499010), (10, 1999208), (16, 1249505), (20, 999604), (40, 499802), (80, 249901), (269, 74320), (538, 37160), (929, 21520), (1076, 18580), (1345, 14864), (1858, 10760), (2152, 9290), (2690, 7432), (3716, 5380), (4304, 4645)]