640756479

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{7523}}^1$

素因数の和:7655

約数の個数: 32

約数和(自身を含む): 975110400

約数和(自身を除く): 334353921

約数列:

[1, 3, 11, 29, 33, 87, 89, 267, 319, 957, 979, 2581, 2937, 7523, 7743, 22569, 28391, 82753, 85173, 218167, 248259, 654501, 669547, 2008641, 2399837, 7199511, 7365017, 19416863, 22095051, 58250589, 213585493, 640756479]

約数ペア:

[(1, 640756479), (3, 213585493), (11, 58250589), (29, 22095051), (33, 19416863), (87, 7365017), (89, 7199511), (267, 2399837), (319, 2008641), (957, 669547), (979, 654501), (2581, 248259), (2937, 218167), (7523, 85173), (7743, 82753), (22569, 28391)]