21142630

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{499}}^1$

素因数の和:748

約数の個数: 32

約数和(自身を含む): 40320000

約数和(自身を除く): 19177370

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 223, 446, 499, 998, 1115, 2230, 2495, 4237, 4990, 8474, 9481, 18962, 21185, 42370, 47405, 94810, 111277, 222554, 556385, 1112770, 2114263, 4228526, 10571315, 21142630]

約数ペア:

[(1, 21142630), (2, 10571315), (5, 4228526), (10, 2114263), (19, 1112770), (38, 556385), (95, 222554), (190, 111277), (223, 94810), (446, 47405), (499, 42370), (998, 21185), (1115, 18962), (2230, 9481), (2495, 8474), (4237, 4990)]