19984995

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{4001}}^1$

素因数の和:4052

約数の個数: 32

約数和(自身を含む): 36498240

約数和(自身を除く): 16513245

約数列:

[1, 3, 5, 9, 15, 27, 37, 45, 111, 135, 185, 333, 555, 999, 1665, 4001, 4995, 12003, 20005, 36009, 60015, 108027, 148037, 180045, 444111, 540135, 740185, 1332333, 2220555, 3996999, 6661665, 19984995]

約数ペア:

[(1, 19984995), (3, 6661665), (5, 3996999), (9, 2220555), (15, 1332333), (27, 740185), (37, 540135), (45, 444111), (111, 180045), (135, 148037), (185, 108027), (333, 60015), (555, 36009), (999, 20005), (1665, 12003), (4001, 4995)]