20900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1$

素因数の和:44

約数の個数: 36

約数和(自身を含む): 52080

約数和(自身を除く): 31180

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 38, 44, 50, 55, 76, 95, 100, 110, 190, 209, 220, 275, 380, 418, 475, 550, 836, 950, 1045, 1100, 1900, 2090, 4180, 5225, 10450, 20900]

約数ペア:

[(1, 20900), (2, 10450), (4, 5225), (5, 4180), (10, 2090), (11, 1900), (19, 1100), (20, 1045), (22, 950), (25, 836), (38, 550), (44, 475), (50, 418), (55, 380), (76, 275), (95, 220), (100, 209), (110, 190)]