20731520

素因数分解:

$2^7\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1117}}^1$

素因数の和:1165

約数の個数: 64

約数和(自身を含む): 51316200

約数和(自身を除く): 30584680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 290, 320, 464, 580, 640, 928, 1117, 1160, 1856, 2234, 2320, 3712, 4468, 4640, 5585, 8936, 9280, 11170, 17872, 18560, 22340, 32393, 35744, 44680, 64786, 71488, 89360, 129572, 142976, 161965, 178720, 259144, 323930, 357440, 518288, 647860, 714880, 1036576, 1295720, 2073152, 2591440, 4146304, 5182880, 10365760, 20731520]

約数ペア:

[(1, 20731520), (2, 10365760), (4, 5182880), (5, 4146304), (8, 2591440), (10, 2073152), (16, 1295720), (20, 1036576), (29, 714880), (32, 647860), (40, 518288), (58, 357440), (64, 323930), (80, 259144), (116, 178720), (128, 161965), (145, 142976), (160, 129572), (232, 89360), (290, 71488), (320, 64786), (464, 44680), (580, 35744), (640, 32393), (928, 22340), (1117, 18560), (1160, 17872), (1856, 11170), (2234, 9280), (2320, 8936), (3712, 5585), (4468, 4640)]