21217156

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{509}}^1\times {\mathrm{613}}^1$

素因数の和:1143

約数の個数: 24

約数和(自身を含む): 39455640

約数和(自身を除く): 18238484

約数列:

[1, 2, 4, 17, 34, 68, 509, 613, 1018, 1226, 2036, 2452, 8653, 10421, 17306, 20842, 34612, 41684, 312017, 624034, 1248068, 5304289, 10608578, 21217156]

約数ペア:

[(1, 21217156), (2, 10608578), (4, 5304289), (17, 1248068), (34, 624034), (68, 312017), (509, 41684), (613, 34612), (1018, 20842), (1226, 17306), (2036, 10421), (2452, 8653)]