19997318

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{4759}}^1$

素因数の和:4963

約数の個数: 16

約数和(自身を含む): 32901120

約数和(自身を除く): 12903802

約数列:

[1, 2, 11, 22, 191, 382, 2101, 4202, 4759, 9518, 52349, 104698, 908969, 1817938, 9998659, 19997318]

約数ペア:

[(1, 19997318), (2, 9998659), (11, 1817938), (22, 908969), (191, 104698), (382, 52349), (2101, 9518), (4202, 4759)]