20864456

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{647}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 40824000

約数和(自身を除く): 19959544

約数列:

[1, 2, 4, 8, 29, 58, 116, 139, 232, 278, 556, 647, 1112, 1294, 2588, 4031, 5176, 8062, 16124, 18763, 32248, 37526, 75052, 89933, 150104, 179866, 359732, 719464, 2608057, 5216114, 10432228, 20864456]

約数ペア:

[(1, 20864456), (2, 10432228), (4, 5216114), (8, 2608057), (29, 719464), (58, 359732), (116, 179866), (139, 150104), (232, 89933), (278, 75052), (556, 37526), (647, 32248), (1112, 18763), (1294, 16124), (2588, 8062), (4031, 5176)]