20990080

素因数分解:

$2^7\times 5^1\times {\mathrm{32797}}^1$

素因数の和:32816

約数の個数: 32

約数和(自身を含む): 50180940

約数和(自身を除く): 29190860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32797, 65594, 131188, 163985, 262376, 327970, 524752, 655940, 1049504, 1311880, 2099008, 2623760, 4198016, 5247520, 10495040, 20990080]

約数ペア:

[(1, 20990080), (2, 10495040), (4, 5247520), (5, 4198016), (8, 2623760), (10, 2099008), (16, 1311880), (20, 1049504), (32, 655940), (40, 524752), (64, 327970), (80, 262376), (128, 163985), (160, 131188), (320, 65594), (640, 32797)]