21242180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62477}}^1$

素因数の和:62503

約数の個数: 24

約数和(自身を含む): 47233368

約数和(自身を除く): 25991188

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62477, 124954, 249908, 312385, 624770, 1062109, 1249540, 2124218, 4248436, 5310545, 10621090, 21242180]

約数ペア:

[(1, 21242180), (2, 10621090), (4, 5310545), (5, 4248436), (10, 2124218), (17, 1249540), (20, 1062109), (34, 624770), (68, 312385), (85, 249908), (170, 124954), (340, 62477)]