20578313

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 26438400

約数和(自身を除く): 5860087

約数列:

[1, 7, 17, 29, 67, 89, 119, 203, 469, 493, 623, 1139, 1513, 1943, 2581, 3451, 5963, 7973, 10591, 13601, 18067, 33031, 41741, 43877, 101371, 172927, 231217, 307139, 709597, 1210489, 2939759, 20578313]

約数ペア:

[(1, 20578313), (7, 2939759), (17, 1210489), (29, 709597), (67, 307139), (89, 231217), (119, 172927), (203, 101371), (469, 43877), (493, 41741), (623, 33031), (1139, 18067), (1513, 13601), (1943, 10591), (2581, 7973), (3451, 5963)]