19901531

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{409}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 22730400

約数和(自身を除く): 2828869

約数列:

[1, 13, 19, 197, 247, 409, 2561, 3743, 5317, 7771, 48659, 80573, 101023, 1047449, 1530887, 19901531]

約数ペア:

[(1, 19901531), (13, 1530887), (19, 1047449), (197, 101023), (247, 80573), (409, 48659), (2561, 7771), (3743, 5317)]