21272090

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{409}}^1\times {\mathrm{743}}^1$

素因数の和:1166

約数の個数: 32

約数和(自身を含む): 43925760

約数和(自身を除く): 22653670

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 409, 743, 818, 1486, 2045, 2863, 3715, 4090, 5201, 5726, 7430, 10402, 14315, 26005, 28630, 52010, 303887, 607774, 1519435, 2127209, 3038870, 4254418, 10636045, 21272090]

約数ペア:

[(1, 21272090), (2, 10636045), (5, 4254418), (7, 3038870), (10, 2127209), (14, 1519435), (35, 607774), (70, 303887), (409, 52010), (743, 28630), (818, 26005), (1486, 14315), (2045, 10402), (2863, 7430), (3715, 5726), (4090, 5201)]