20999690

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{91303}}^1$

素因数の和:91333

約数の個数: 16

約数和(自身を含む): 39443328

約数和(自身を除く): 18443638

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 91303, 182606, 456515, 913030, 2099969, 4199938, 10499845, 20999690]

約数ペア:

[(1, 20999690), (2, 10499845), (5, 4199938), (10, 2099969), (23, 913030), (46, 456515), (115, 182606), (230, 91303)]