28284980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19919}}^1$

素因数の和:19999

約数の個数: 24

約数和(自身を含む): 60238080

約数和(自身を除く): 31953100

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 19919, 39838, 79676, 99595, 199190, 398380, 1414249, 2828498, 5656996, 7071245, 14142490, 28284980]

約数ペア:

[(1, 28284980), (2, 14142490), (4, 7071245), (5, 5656996), (10, 2828498), (20, 1414249), (71, 398380), (142, 199190), (284, 99595), (355, 79676), (710, 39838), (1420, 19919)]