21091040

素因数分解:

$2^5\times 5^1\times {\mathrm{193}}^1\times {\mathrm{683}}^1$

素因数の和:891

約数の個数: 48

約数和(自身を含む): 50159088

約数和(自身を除く): 29068048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 193, 386, 683, 772, 965, 1366, 1544, 1930, 2732, 3088, 3415, 3860, 5464, 6176, 6830, 7720, 10928, 13660, 15440, 21856, 27320, 30880, 54640, 109280, 131819, 263638, 527276, 659095, 1054552, 1318190, 2109104, 2636380, 4218208, 5272760, 10545520, 21091040]

約数ペア:

[(1, 21091040), (2, 10545520), (4, 5272760), (5, 4218208), (8, 2636380), (10, 2109104), (16, 1318190), (20, 1054552), (32, 659095), (40, 527276), (80, 263638), (160, 131819), (193, 109280), (386, 54640), (683, 30880), (772, 27320), (965, 21856), (1366, 15440), (1544, 13660), (1930, 10928), (2732, 7720), (3088, 6830), (3415, 6176), (3860, 5464)]