21691813

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{8923}}^1$

素因数の和:8964

約数の個数: 16

約数和(自身を含む): 26986176

約数和(自身を除く): 5294363

約数列:

[1, 11, 13, 17, 143, 187, 221, 2431, 8923, 98153, 115999, 151691, 1275989, 1668601, 1971983, 21691813]

約数ペア:

[(1, 21691813), (11, 1971983), (13, 1668601), (17, 1275989), (143, 151691), (187, 115999), (221, 98153), (2431, 8923)]