20868407

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1\times {\mathrm{409}}^1$

素因数の和:650

約数の個数: 16

約数和(自身を含む): 24678720

約数和(自身を除く): 3810313

約数列:

[1, 7, 37, 197, 259, 409, 1379, 2863, 7289, 15133, 51023, 80573, 105931, 564011, 2981201, 20868407]

約数ペア:

[(1, 20868407), (7, 2981201), (37, 564011), (197, 105931), (259, 80573), (409, 51023), (1379, 15133), (2863, 7289)]