1281905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:256

約数の個数: 16

約数和(自身を含む): 1638144

約数和(自身を除く): 356239

約数列:

[1, 5, 23, 71, 115, 157, 355, 785, 1633, 3611, 8165, 11147, 18055, 55735, 256381, 1281905]

約数ペア:

[(1, 1281905), (5, 256381), (23, 55735), (71, 18055), (115, 11147), (157, 8165), (355, 3611), (785, 1633)]