19905140

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2027}}^1$

素因数の和:2527

約数の個数: 24

約数和(自身を含む): 41906592

約数和(自身を除く): 22001452

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2027, 2455, 4054, 4910, 8108, 9820, 10135, 20270, 40540, 995257, 1990514, 3981028, 4976285, 9952570, 19905140]

約数ペア:

[(1, 19905140), (2, 9952570), (4, 4976285), (5, 3981028), (10, 1990514), (20, 995257), (491, 40540), (982, 20270), (1964, 10135), (2027, 9820), (2455, 8108), (4054, 4910)]