21326720

素因数分解:

$2^7\times 5^1\times {\mathrm{47}}^1\times {\mathrm{709}}^1$

素因数の和:775

約数の個数: 64

約数和(自身を含む): 52142400

約数和(自身を除く): 30815680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 47, 64, 80, 94, 128, 160, 188, 235, 320, 376, 470, 640, 709, 752, 940, 1418, 1504, 1880, 2836, 3008, 3545, 3760, 5672, 6016, 7090, 7520, 11344, 14180, 15040, 22688, 28360, 30080, 33323, 45376, 56720, 66646, 90752, 113440, 133292, 166615, 226880, 266584, 333230, 453760, 533168, 666460, 1066336, 1332920, 2132672, 2665840, 4265344, 5331680, 10663360, 21326720]

約数ペア:

[(1, 21326720), (2, 10663360), (4, 5331680), (5, 4265344), (8, 2665840), (10, 2132672), (16, 1332920), (20, 1066336), (32, 666460), (40, 533168), (47, 453760), (64, 333230), (80, 266584), (94, 226880), (128, 166615), (160, 133292), (188, 113440), (235, 90752), (320, 66646), (376, 56720), (470, 45376), (640, 33323), (709, 30080), (752, 28360), (940, 22688), (1418, 15040), (1504, 14180), (1880, 11344), (2836, 7520), (3008, 7090), (3545, 6016), (3760, 5672)]