21605060

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2777}}^1$

素因数の和:3175

約数の個数: 24

約数和(自身を含む): 45503640

約数和(自身を除く): 23898580

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2777, 3890, 5554, 7780, 11108, 13885, 27770, 55540, 1080253, 2160506, 4321012, 5401265, 10802530, 21605060]

約数ペア:

[(1, 21605060), (2, 10802530), (4, 5401265), (5, 4321012), (10, 2160506), (20, 1080253), (389, 55540), (778, 27770), (1556, 13885), (1945, 11108), (2777, 7780), (3890, 5554)]