21870054

素因数分解:

$2^1\times 3^3\times {\mathrm{405001}}^1$

素因数の和:405012

約数の個数: 16

約数和(自身を含む): 48600240

約数和(自身を除く): 26730186

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 405001, 810002, 1215003, 2430006, 3645009, 7290018, 10935027, 21870054]

約数ペア:

[(1, 21870054), (2, 10935027), (3, 7290018), (6, 3645009), (9, 2430006), (18, 1215003), (27, 810002), (54, 405001)]