21478849

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{1879}}^1$

素因数の和:1980

約数の個数: 16

約数和(自身を含む): 25989120

約数和(自身を除く): 4510271

約数列:

[1, 7, 23, 71, 161, 497, 1633, 1879, 11431, 13153, 43217, 133409, 302519, 933863, 3068407, 21478849]

約数ペア:

[(1, 21478849), (7, 3068407), (23, 933863), (71, 302519), (161, 133409), (497, 43217), (1633, 13153), (1879, 11431)]