21828380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6779}}^1$

素因数の和:6818

約数の個数: 48

約数和(自身を含む): 54673920

約数和(自身を除く): 32845540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6779, 13558, 27116, 33895, 47453, 67790, 94906, 135580, 155917, 189812, 237265, 311834, 474530, 623668, 779585, 949060, 1091419, 1559170, 2182838, 3118340, 4365676, 5457095, 10914190, 21828380]

約数ペア:

[(1, 21828380), (2, 10914190), (4, 5457095), (5, 4365676), (7, 3118340), (10, 2182838), (14, 1559170), (20, 1091419), (23, 949060), (28, 779585), (35, 623668), (46, 474530), (70, 311834), (92, 237265), (115, 189812), (140, 155917), (161, 135580), (230, 94906), (322, 67790), (460, 47453), (644, 33895), (805, 27116), (1610, 13558), (3220, 6779)]