21278426

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{19961}}^1$

素因数の和:20017

約数の個数: 16

約数和(自身を含む): 35212968

約数和(自身を除く): 13934542

約数列:

[1, 2, 13, 26, 41, 82, 533, 1066, 19961, 39922, 259493, 518986, 818401, 1636802, 10639213, 21278426]

約数ペア:

[(1, 21278426), (2, 10639213), (13, 1636802), (26, 818401), (41, 518986), (82, 259493), (533, 39922), (1066, 19961)]