28872123

素因数分解:

$3^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{997}}^1$

素因数の和:1211

約数の個数: 24

約数和(自身を含む): 45053712

約数和(自身を除く): 16181589

約数列:

[1, 3, 7, 21, 49, 147, 197, 591, 997, 1379, 2991, 4137, 6979, 9653, 20937, 28959, 48853, 146559, 196409, 589227, 1374863, 4124589, 9624041, 28872123]

約数ペア:

[(1, 28872123), (3, 9624041), (7, 4124589), (21, 1374863), (49, 589227), (147, 196409), (197, 146559), (591, 48853), (997, 28959), (1379, 20937), (2991, 9653), (4137, 6979)]