20509912

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{36109}}^1$

素因数の和:36186

約数の個数: 16

約数和(自身を含む): 38998800

約数和(自身を除く): 18488888

約数列:

[1, 2, 4, 8, 71, 142, 284, 568, 36109, 72218, 144436, 288872, 2563739, 5127478, 10254956, 20509912]

約数ペア:

[(1, 20509912), (2, 10254956), (4, 5127478), (8, 2563739), (71, 288872), (142, 144436), (284, 72218), (568, 36109)]