20641880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73721}}^1$

素因数の和:73739

約数の個数: 32

約数和(自身を含む): 53079840

約数和(自身を除く): 32437960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 73721, 147442, 294884, 368605, 516047, 589768, 737210, 1032094, 1474420, 2064188, 2580235, 2948840, 4128376, 5160470, 10320940, 20641880]

約数ペア:

[(1, 20641880), (2, 10320940), (4, 5160470), (5, 4128376), (7, 2948840), (8, 2580235), (10, 2064188), (14, 1474420), (20, 1032094), (28, 737210), (35, 589768), (40, 516047), (56, 368605), (70, 294884), (140, 147442), (280, 73721)]