20904640

素因数分解:

$2^6\times 5^1\times {\mathrm{65327}}^1$

素因数の和:65344

約数の個数: 28

約数和(自身を含む): 49779936

約数和(自身を除く): 28875296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65327, 130654, 261308, 326635, 522616, 653270, 1045232, 1306540, 2090464, 2613080, 4180928, 5226160, 10452320, 20904640]

約数ペア:

[(1, 20904640), (2, 10452320), (4, 5226160), (5, 4180928), (8, 2613080), (10, 2090464), (16, 1306540), (20, 1045232), (32, 653270), (40, 522616), (64, 326635), (80, 261308), (160, 130654), (320, 65327)]