21403317

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{223}}^1$

素因数の和:369

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 11110731

約数列:

[1, 3, 13, 23, 39, 69, 107, 223, 299, 321, 669, 897, 1391, 2461, 2899, 4173, 5129, 7383, 8697, 15387, 23861, 31993, 66677, 71583, 95979, 200031, 310193, 548803, 930579, 1646409, 7134439, 21403317]

約数ペア:

[(1, 21403317), (3, 7134439), (13, 1646409), (23, 930579), (39, 548803), (69, 310193), (107, 200031), (223, 95979), (299, 71583), (321, 66677), (669, 31993), (897, 23861), (1391, 15387), (2461, 8697), (2899, 7383), (4173, 5129)]