21980109

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{2789}}^1$

素因数の和:2900

約数の個数: 16

約数和(自身を含む): 30533760

約数和(自身を除く): 8553651

約数列:

[1, 3, 37, 71, 111, 213, 2627, 2789, 7881, 8367, 103193, 198019, 309579, 594057, 7326703, 21980109]

約数ペア:

[(1, 21980109), (3, 7326703), (37, 594057), (71, 309579), (111, 198019), (213, 103193), (2627, 8367), (2789, 7881)]