21155398

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:193

約数の個数: 48

約数和(自身を含む): 37920960

約数和(自身を除く): 16765562

約数列:

[1, 2, 11, 19, 22, 38, 43, 86, 107, 121, 209, 214, 242, 418, 473, 817, 946, 1177, 1634, 2033, 2299, 2354, 4066, 4598, 4601, 5203, 8987, 9202, 10406, 12947, 17974, 22363, 25894, 44726, 50611, 87419, 98857, 101222, 174838, 197714, 245993, 491986, 556721, 961609, 1113442, 1923218, 10577699, 21155398]

約数ペア:

[(1, 21155398), (2, 10577699), (11, 1923218), (19, 1113442), (22, 961609), (38, 556721), (43, 491986), (86, 245993), (107, 197714), (121, 174838), (209, 101222), (214, 98857), (242, 87419), (418, 50611), (473, 44726), (817, 25894), (946, 22363), (1177, 17974), (1634, 12947), (2033, 10406), (2299, 9202), (2354, 8987), (4066, 5203), (4598, 4601)]