20904080

素因数分解:

$2^4\times 5^1\times {\mathrm{261301}}^1$

素因数の和:261314

約数の個数: 20

約数和(自身を含む): 48602172

約数和(自身を除く): 27698092

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261301, 522602, 1045204, 1306505, 2090408, 2613010, 4180816, 5226020, 10452040, 20904080]

約数ペア:

[(1, 20904080), (2, 10452040), (4, 5226020), (5, 4180816), (8, 2613010), (10, 2090408), (16, 1306505), (20, 1045204), (40, 522602), (80, 261301)]