20657021

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{4547}}^1$

素因数の和:4624

約数の個数: 16

約数和(自身を含む): 26196480

約数和(自身を除く): 5539459

約数列:

[1, 7, 11, 59, 77, 413, 649, 4543, 4547, 31829, 50017, 268273, 350119, 1877911, 2951003, 20657021]

約数ペア:

[(1, 20657021), (7, 2951003), (11, 1877911), (59, 350119), (77, 268273), (413, 50017), (649, 31829), (4543, 4547)]