21509055

素因数分解:

$3^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1109}}^1$

素因数の和:1551

約数の個数: 24

約数和(自身を含む): 37402560

約数和(自身を除く): 15893505

約数列:

[1, 3, 5, 9, 15, 45, 431, 1109, 1293, 2155, 3327, 3879, 5545, 6465, 9981, 16635, 19395, 49905, 477979, 1433937, 2389895, 4301811, 7169685, 21509055]

約数ペア:

[(1, 21509055), (3, 7169685), (5, 4301811), (9, 2389895), (15, 1433937), (45, 477979), (431, 49905), (1109, 19395), (1293, 16635), (2155, 9981), (3327, 6465), (3879, 5545)]