20499890

素因数分解:

$2^1\times 5^1\times {\mathrm{1091}}^1\times {\mathrm{1879}}^1$

素因数の和:2977

約数の個数: 16

約数和(自身を含む): 36953280

約数和(自身を除く): 16453390

約数列:

[1, 2, 5, 10, 1091, 1879, 2182, 3758, 5455, 9395, 10910, 18790, 2049989, 4099978, 10249945, 20499890]

約数ペア:

[(1, 20499890), (2, 10249945), (5, 4099978), (10, 2049989), (1091, 18790), (1879, 10910), (2182, 9395), (3758, 5455)]