About the Number

128648640

128648639 ← → 128648641

2進数表記:111101010110000010111000000

漢数字表記:一億二千八百六十四万八千六百四十

素因数分解:

2 6 × 3 1 × 5 1 × 29 1 × 4621 1

素因数の和:4670
約数の個数: 112
約数和(自身を含む): 422635680
約数和(自身を除く): 293987040

約数列:
[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 29, 30, 32, 40, 48, 58, 60, 64, 80, 87, 96, 116, 120, 145, 160, 174, 192, 232, 240, 290, 320, 348, 435, 464, 480, 580, 696, 870, 928, 960, 1160, 1392, 1740, 1856, 2320, 2784, 3480, 4621, 4640, 5568, 6960, 9242, 9280, 13863, 13920, 18484, 23105, 27726, 27840, 36968, 46210, 55452, 69315, 73936, 92420, 110904, 134009, 138630, 147872, 184840, 221808, 268018, 277260, 295744, 369680, 402027, 443616, 536036, 554520, 670045, 739360, 804054, 887232, 1072072, 1109040, 1340090, 1478720, 1608108, 2010135, 2144144, 2218080, 2680180, 3216216, 4020270, 4288288, 4436160, 5360360, 6432432, 8040540, 8576576, 10720720, 12864864, 16081080, 21441440, 25729728, 32162160, 42882880, 64324320, 128648640]

約数ペア:
[(1, 128648640), (2, 64324320), (3, 42882880), (4, 32162160), (5, 25729728), (6, 21441440), (8, 16081080), (10, 12864864), (12, 10720720), (15, 8576576), (16, 8040540), (20, 6432432), (24, 5360360), (29, 4436160), (30, 4288288), (32, 4020270), (40, 3216216), (48, 2680180), (58, 2218080), (60, 2144144), (64, 2010135), (80, 1608108), (87, 1478720), (96, 1340090), (116, 1109040), (120, 1072072), (145, 887232), (160, 804054), (174, 739360), (192, 670045), (232, 554520), (240, 536036), (290, 443616), (320, 402027), (348, 369680), (435, 295744), (464, 277260), (480, 268018), (580, 221808), (696, 184840), (870, 147872), (928, 138630), (960, 134009), (1160, 110904), (1392, 92420), (1740, 73936), (1856, 69315), (2320, 55452), (2784, 46210), (3480, 36968), (4621, 27840), (4640, 27726), (5568, 23105), (6960, 18484), (9242, 13920), (9280, 13863)]

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