21569961

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{23887}}^1$

素因数の和:23940

約数の個数: 16

約数和(自身を含む): 33634304

約数和(自身を除く): 12064343

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 23887, 71661, 167209, 501627, 1027141, 3081423, 7189987, 21569961]

約数ペア:

[(1, 21569961), (3, 7189987), (7, 3081423), (21, 1027141), (43, 501627), (129, 167209), (301, 71661), (903, 23887)]