18977945

素因数分解:

$5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1091}}^1$

素因数の和:1181

約数の個数: 24

約数和(自身を含む): 26889408

約数和(自身を除く): 7911463

約数列:

[1, 5, 7, 35, 49, 71, 245, 355, 497, 1091, 2485, 3479, 5455, 7637, 17395, 38185, 53459, 77461, 267295, 387305, 542227, 2711135, 3795589, 18977945]

約数ペア:

[(1, 18977945), (5, 3795589), (7, 2711135), (35, 542227), (49, 387305), (71, 267295), (245, 77461), (355, 53459), (497, 38185), (1091, 17395), (2485, 7637), (3479, 5455)]