20291308

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 36276800

約数和(自身を除く): 15985492

約数列:

[1, 2, 4, 79, 157, 158, 314, 316, 409, 628, 818, 1636, 12403, 24806, 32311, 49612, 64213, 64622, 128426, 129244, 256852, 5072827, 10145654, 20291308]

約数ペア:

[(1, 20291308), (2, 10145654), (4, 5072827), (79, 256852), (157, 129244), (158, 128426), (314, 64622), (316, 64213), (409, 49612), (628, 32311), (818, 24806), (1636, 12403)]