21655720

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11519}}^1$

素因数の和:11577

約数の個数: 32

約数和(自身を含む): 49766400

約数和(自身を除く): 28110680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11519, 23038, 46076, 57595, 92152, 115190, 230380, 460760, 541393, 1082786, 2165572, 2706965, 4331144, 5413930, 10827860, 21655720]

約数ペア:

[(1, 21655720), (2, 10827860), (4, 5413930), (5, 4331144), (8, 2706965), (10, 2165572), (20, 1082786), (40, 541393), (47, 460760), (94, 230380), (188, 115190), (235, 92152), (376, 57595), (470, 46076), (940, 23038), (1880, 11519)]