20850820

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2549}}^1$

素因数の和:2967

約数の個数: 24

約数和(自身を含む): 43911000

約数和(自身を除く): 23060180

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2549, 4090, 5098, 8180, 10196, 12745, 25490, 50980, 1042541, 2085082, 4170164, 5212705, 10425410, 20850820]

約数ペア:

[(1, 20850820), (2, 10425410), (4, 5212705), (5, 4170164), (10, 2085082), (20, 1042541), (409, 50980), (818, 25490), (1636, 12745), (2045, 10196), (2549, 8180), (4090, 5098)]