20798080

素因数分解:

$2^7\times 5^1\times {\mathrm{32497}}^1$

素因数の和:32516

約数の個数: 32

約数和(自身を含む): 49721940

約数和(自身を除く): 28923860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32497, 64994, 129988, 162485, 259976, 324970, 519952, 649940, 1039904, 1299880, 2079808, 2599760, 4159616, 5199520, 10399040, 20798080]

約数ペア:

[(1, 20798080), (2, 10399040), (4, 5199520), (5, 4159616), (8, 2599760), (10, 2079808), (16, 1299880), (20, 1039904), (32, 649940), (40, 519952), (64, 324970), (80, 259976), (128, 162485), (160, 129988), (320, 64994), (640, 32497)]