21431137

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 6438047

約数列:

[1, 7, 13, 31, 71, 91, 107, 217, 403, 497, 749, 923, 1391, 2201, 2821, 3317, 6461, 7597, 9737, 15407, 23219, 28613, 43121, 53179, 98761, 200291, 235507, 301847, 691327, 1648549, 3061591, 21431137]

約数ペア:

[(1, 21431137), (7, 3061591), (13, 1648549), (31, 691327), (71, 301847), (91, 235507), (107, 200291), (217, 98761), (403, 53179), (497, 43121), (749, 28613), (923, 23219), (1391, 15407), (2201, 9737), (2821, 7597), (3317, 6461)]