21687873

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 32348160

約数和(自身を除く): 10660287

約数列:

[1, 3, 19, 23, 57, 69, 71, 213, 233, 437, 699, 1311, 1349, 1633, 4047, 4427, 4899, 5359, 13281, 16077, 16543, 31027, 49629, 93081, 101821, 305463, 314317, 380489, 942951, 1141467, 7229291, 21687873]

約数ペア:

[(1, 21687873), (3, 7229291), (19, 1141467), (23, 942951), (57, 380489), (69, 314317), (71, 305463), (213, 101821), (233, 93081), (437, 49629), (699, 31027), (1311, 16543), (1349, 16077), (1633, 13281), (4047, 5359), (4427, 4899)]