20219979

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{499}}^1\times {\mathrm{1039}}^1$

素因数の和:1554

約数の個数: 16

約数和(自身を含む): 29120000

約数和(自身を除く): 8900021

約数列:

[1, 3, 13, 39, 499, 1039, 1497, 3117, 6487, 13507, 19461, 40521, 518461, 1555383, 6739993, 20219979]

約数ペア:

[(1, 20219979), (3, 6739993), (13, 1555383), (39, 518461), (499, 40521), (1039, 19461), (1497, 13507), (3117, 6487)]