21971518

素因数分解:

$2^1\times {\mathrm{71}}^1\times {\mathrm{359}}^1\times {\mathrm{431}}^1$

素因数の和:863

約数の個数: 16

約数和(自身を含む): 33592320

約数和(自身を除く): 11620802

約数列:

[1, 2, 71, 142, 359, 431, 718, 862, 25489, 30601, 50978, 61202, 154729, 309458, 10985759, 21971518]

約数ペア:

[(1, 21971518), (2, 10985759), (71, 309458), (142, 154729), (359, 61202), (431, 50978), (718, 30601), (862, 25489)]