19972979

素因数分解:

${\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{337}}^1$

素因数の和:494

約数の個数: 16

約数和(自身を含む): 22259328

約数和(自身を除く): 2286349

約数列:

[1, 13, 47, 97, 337, 611, 1261, 4381, 4559, 15839, 32689, 59267, 205907, 424957, 1536383, 19972979]

約数ペア:

[(1, 19972979), (13, 1536383), (47, 424957), (97, 205907), (337, 59267), (611, 32689), (1261, 15839), (4381, 4559)]