About the Number

131381280

131381279 ← → 131381281

2進数表記:111110101001011100000100000

漢数字表記:一億三千百三十八万千二百八十

素因数分解:

2 5 × 3 2 × 5 1 × 91237 1

素因数の和:91258
約数の個数: 72
約数和(自身を含む): 448343532
約数和(自身を除く): 316962252

約数列:
[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 72, 80, 90, 96, 120, 144, 160, 180, 240, 288, 360, 480, 720, 1440, 91237, 182474, 273711, 364948, 456185, 547422, 729896, 821133, 912370, 1094844, 1368555, 1459792, 1642266, 1824740, 2189688, 2737110, 2919584, 3284532, 3649480, 4105665, 4379376, 5474220, 6569064, 7298960, 8211330, 8758752, 10948440, 13138128, 14597920, 16422660, 21896880, 26276256, 32845320, 43793760, 65690640, 131381280]

約数ペア:
[(1, 131381280), (2, 65690640), (3, 43793760), (4, 32845320), (5, 26276256), (6, 21896880), (8, 16422660), (9, 14597920), (10, 13138128), (12, 10948440), (15, 8758752), (16, 8211330), (18, 7298960), (20, 6569064), (24, 5474220), (30, 4379376), (32, 4105665), (36, 3649480), (40, 3284532), (45, 2919584), (48, 2737110), (60, 2189688), (72, 1824740), (80, 1642266), (90, 1459792), (96, 1368555), (120, 1094844), (144, 912370), (160, 821133), (180, 729896), (240, 547422), (288, 456185), (360, 364948), (480, 273711), (720, 182474), (1440, 91237)]

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