639888

素因数分解:

$2^4\times 3^1\times {\mathrm{13331}}^1$

素因数の和:13342

約数の個数: 20

約数和(自身を含む): 1653168

約数和(自身を除く): 1013280

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 13331, 26662, 39993, 53324, 79986, 106648, 159972, 213296, 319944, 639888]

約数ペア:

[(1, 639888), (2, 319944), (3, 213296), (4, 159972), (6, 106648), (8, 79986), (12, 53324), (16, 39993), (24, 26662), (48, 13331)]