19866128

素因数分解:

$2^4\times {\mathrm{643}}^1\times {\mathrm{1931}}^1$

素因数の和:2582

約数の個数: 20

約数和(自身を含む): 38570448

約数和(自身を除く): 18704320

約数列:

[1, 2, 4, 8, 16, 643, 1286, 1931, 2572, 3862, 5144, 7724, 10288, 15448, 30896, 1241633, 2483266, 4966532, 9933064, 19866128]

約数ペア:

[(1, 19866128), (2, 9933064), (4, 4966532), (8, 2483266), (16, 1241633), (643, 30896), (1286, 15448), (1931, 10288), (2572, 7724), (3862, 5144)]