21921277

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{367}}^1$

素因数の和:457

約数の個数: 24

約数和(自身を含む): 27184896

約数和(自身を除く): 5263619

約数列:

[1, 7, 23, 49, 53, 161, 367, 371, 1127, 1219, 2569, 2597, 8441, 8533, 17983, 19451, 59087, 59731, 136157, 413609, 447373, 953099, 3131611, 21921277]

約数ペア:

[(1, 21921277), (7, 3131611), (23, 953099), (49, 447373), (53, 413609), (161, 136157), (367, 59731), (371, 59087), (1127, 19451), (1219, 17983), (2569, 8533), (2597, 8441)]