About the Number

129728640

129728639 ← → 129728641

2進数表記:111101110111000000010000000

漢数字表記:一億二千九百七十二万八千六百四十

素因数分解:

2 7 × 3 1 × 5 1 × 67567 1

素因数の和:67589
約数の個数: 64
約数和(自身を含む): 413516160
約数和(自身を除く): 283787520

約数列:
[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 320, 384, 480, 640, 960, 1920, 67567, 135134, 202701, 270268, 337835, 405402, 540536, 675670, 810804, 1013505, 1081072, 1351340, 1621608, 2027010, 2162144, 2702680, 3243216, 4054020, 4324288, 5405360, 6486432, 8108040, 8648576, 10810720, 12972864, 16216080, 21621440, 25945728, 32432160, 43242880, 64864320, 129728640]

約数ペア:
[(1, 129728640), (2, 64864320), (3, 43242880), (4, 32432160), (5, 25945728), (6, 21621440), (8, 16216080), (10, 12972864), (12, 10810720), (15, 8648576), (16, 8108040), (20, 6486432), (24, 5405360), (30, 4324288), (32, 4054020), (40, 3243216), (48, 2702680), (60, 2162144), (64, 2027010), (80, 1621608), (96, 1351340), (120, 1081072), (128, 1013505), (160, 810804), (192, 675670), (240, 540536), (320, 405402), (384, 337835), (480, 270268), (640, 202701), (960, 135134), (1920, 67567)]

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