20018128

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{613}}^1$

素因数の和:791

約数の個数: 40

約数和(自身を含む): 42103208

約数和(自身を除く): 22085080

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 157, 208, 314, 613, 628, 1226, 1256, 2041, 2452, 2512, 4082, 4904, 7969, 8164, 9808, 15938, 16328, 31876, 32656, 63752, 96241, 127504, 192482, 384964, 769928, 1251133, 1539856, 2502266, 5004532, 10009064, 20018128]

約数ペア:

[(1, 20018128), (2, 10009064), (4, 5004532), (8, 2502266), (13, 1539856), (16, 1251133), (26, 769928), (52, 384964), (104, 192482), (157, 127504), (208, 96241), (314, 63752), (613, 32656), (628, 31876), (1226, 16328), (1256, 15938), (2041, 9808), (2452, 8164), (2512, 7969), (4082, 4904)]