20889635

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 28667520

約数和(自身を除く): 7777885

約数列:

[1, 5, 13, 23, 65, 89, 115, 157, 299, 445, 785, 1157, 1495, 2041, 2047, 3611, 5785, 10205, 10235, 13973, 18055, 26611, 46943, 69865, 133055, 181649, 234715, 321379, 908245, 1606895, 4177927, 20889635]

約数ペア:

[(1, 20889635), (5, 4177927), (13, 1606895), (23, 908245), (65, 321379), (89, 234715), (115, 181649), (157, 133055), (299, 69865), (445, 46943), (785, 26611), (1157, 18055), (1495, 13973), (2041, 10235), (2047, 10205), (3611, 5785)]