20647040

素因数分解:

$2^7\times 5^1\times {\mathrm{32261}}^1$

素因数の和:32280

約数の個数: 32

約数和(自身を含む): 49360860

約数和(自身を除く): 28713820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32261, 64522, 129044, 161305, 258088, 322610, 516176, 645220, 1032352, 1290440, 2064704, 2580880, 4129408, 5161760, 10323520, 20647040]

約数ペア:

[(1, 20647040), (2, 10323520), (4, 5161760), (5, 4129408), (8, 2580880), (10, 2064704), (16, 1290440), (20, 1032352), (32, 645220), (40, 516176), (64, 322610), (80, 258088), (128, 161305), (160, 129044), (320, 64522), (640, 32261)]