18015555

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{661}}^1$

素因数の和:771

約数の個数: 32

約数和(自身を含む): 30504960

約数和(自身を除く): 12489405

約数列:

[1, 3, 5, 15, 23, 69, 79, 115, 237, 345, 395, 661, 1185, 1817, 1983, 3305, 5451, 9085, 9915, 15203, 27255, 45609, 52219, 76015, 156657, 228045, 261095, 783285, 1201037, 3603111, 6005185, 18015555]

約数ペア:

[(1, 18015555), (3, 6005185), (5, 3603111), (15, 1201037), (23, 783285), (69, 261095), (79, 228045), (115, 156657), (237, 76015), (345, 52219), (395, 45609), (661, 27255), (1185, 15203), (1817, 9915), (1983, 9085), (3305, 5451)]