20781587956

素因数分解:

$2^2\times {\mathrm{131}}^1\times {\mathrm{39659519}}^1$

素因数の和:39659654

約数の個数: 12

約数和(自身を含む): 36645396480

約数和(自身を除く): 15863808524

約数列:

[1, 2, 4, 131, 262, 524, 39659519, 79319038, 158638076, 5195396989, 10390793978, 20781587956]

約数ペア:

[(1, 20781587956), (2, 10390793978), (4, 5195396989), (131, 158638076), (262, 79319038), (524, 39659519)]