19988769

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{37}}^2\times {\mathrm{157}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 28455168

約数和(自身を除く): 8466399

約数列:

[1, 3, 31, 37, 93, 111, 157, 471, 1147, 1369, 3441, 4107, 4867, 5809, 14601, 17427, 42439, 127317, 180079, 214933, 540237, 644799, 6662923, 19988769]

約数ペア:

[(1, 19988769), (3, 6662923), (31, 644799), (37, 540237), (93, 214933), (111, 180079), (157, 127317), (471, 42439), (1147, 17427), (1369, 14601), (3441, 5809), (4107, 4867)]