20811205

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:205

約数の個数: 32

約数和(自身を含む): 27535104

約数和(自身を除く): 6723899

約数列:

[1, 5, 23, 37, 67, 73, 115, 185, 335, 365, 851, 1541, 1679, 2479, 2701, 4255, 4891, 7705, 8395, 12395, 13505, 24455, 57017, 62123, 112493, 180967, 285085, 310615, 562465, 904835, 4162241, 20811205]

約数ペア:

[(1, 20811205), (5, 4162241), (23, 904835), (37, 562465), (67, 310615), (73, 285085), (115, 180967), (185, 112493), (335, 62123), (365, 57017), (851, 24455), (1541, 13505), (1679, 12395), (2479, 8395), (2701, 7705), (4255, 4891)]