21981272

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{161627}}^1$

素因数の和:161650

約数の個数: 16

約数和(自身を含む): 43639560

約数和(自身を除く): 21658288

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 161627, 323254, 646508, 1293016, 2747659, 5495318, 10990636, 21981272]

約数ペア:

[(1, 21981272), (2, 10990636), (4, 5495318), (8, 2747659), (17, 1293016), (34, 646508), (68, 323254), (136, 161627)]