19809801

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{499}}^1$

素因数の和:917

約数の個数: 24

約数和(自身を含む): 31356000

約数和(自身を除く): 11546199

約数列:

[1, 3, 9, 11, 33, 99, 401, 499, 1203, 1497, 3609, 4411, 4491, 5489, 13233, 16467, 39699, 49401, 200099, 600297, 1800891, 2201089, 6603267, 19809801]

約数ペア:

[(1, 19809801), (3, 6603267), (9, 2201089), (11, 1800891), (33, 600297), (99, 200099), (401, 49401), (499, 39699), (1203, 16467), (1497, 13233), (3609, 5489), (4411, 4491)]