20640543848

素因数分解:

$2^3\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{257981}}^1$

素因数の和:258197

約数の個数: 32

約数和(自身を含む): 39517682760

約数和(自身を除く): 18877138912

約数列:

[1, 2, 4, 8, 73, 137, 146, 274, 292, 548, 584, 1096, 10001, 20002, 40004, 80008, 257981, 515962, 1031924, 2063848, 18832613, 35343397, 37665226, 70686794, 75330452, 141373588, 150660904, 282747176, 2580067981, 5160135962, 10320271924, 20640543848]

約数ペア:

[(1, 20640543848), (2, 10320271924), (4, 5160135962), (8, 2580067981), (73, 282747176), (137, 150660904), (146, 141373588), (274, 75330452), (292, 70686794), (548, 37665226), (584, 35343397), (1096, 18832613), (10001, 2063848), (20002, 1031924), (40004, 515962), (80008, 257981)]