21000756028

素因数分解:

$2^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{2918393}}^1$

素因数の和:2918661

約数の個数: 24

約数和(自身を含む): 42164956512

約数和(自身を除く): 21164200484

約数列:

[1, 2, 4, 7, 14, 28, 257, 514, 1028, 1799, 3598, 7196, 2918393, 5836786, 11673572, 20428751, 40857502, 81715004, 750027001, 1500054002, 3000108004, 5250189007, 10500378014, 21000756028]

約数ペア:

[(1, 21000756028), (2, 10500378014), (4, 5250189007), (7, 3000108004), (14, 1500054002), (28, 750027001), (257, 81715004), (514, 40857502), (1028, 20428751), (1799, 11673572), (3598, 5836786), (7196, 2918393)]