20378864

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{1301}}^1$

素因数の和:1409

約数の個数: 40

約数和(自身を含む): 43590960

約数和(自身を除く): 23212096

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 89, 176, 178, 356, 712, 979, 1301, 1424, 1958, 2602, 3916, 5204, 7832, 10408, 14311, 15664, 20816, 28622, 57244, 114488, 115789, 228976, 231578, 463156, 926312, 1273679, 1852624, 2547358, 5094716, 10189432, 20378864]

約数ペア:

[(1, 20378864), (2, 10189432), (4, 5094716), (8, 2547358), (11, 1852624), (16, 1273679), (22, 926312), (44, 463156), (88, 231578), (89, 228976), (176, 115789), (178, 114488), (356, 57244), (712, 28622), (979, 20816), (1301, 15664), (1424, 14311), (1958, 10408), (2602, 7832), (3916, 5204)]