640380543

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{337}}^1\times {\mathrm{647}}^1$

素因数の和:1087

約数の個数: 32

約数和(自身を含む): 946183680

約数和(自身を除く): 305803137

約数列:

[1, 3, 11, 33, 89, 267, 337, 647, 979, 1011, 1941, 2937, 3707, 7117, 11121, 21351, 29993, 57583, 89979, 172749, 218039, 329923, 633413, 654117, 989769, 1900239, 2398429, 7195287, 19405471, 58216413, 213460181, 640380543]

約数ペア:

[(1, 640380543), (3, 213460181), (11, 58216413), (33, 19405471), (89, 7195287), (267, 2398429), (337, 1900239), (647, 989769), (979, 654117), (1011, 633413), (1941, 329923), (2937, 218039), (3707, 172749), (7117, 89979), (11121, 57583), (21351, 29993)]