About the Number

131210280

131210279 ← → 131210281

2進数表記:111110100100001110000101000

漢数字表記:一億三千百二十一万二百八十

素因数分解:

2 3 × 3 5 × 5 1 × 13499 1

素因数の和:13525
約数の個数: 96
約数和(自身を含む): 442260000
約数和(自身を除く): 311049720

約数列:
[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 243, 270, 324, 360, 405, 486, 540, 648, 810, 972, 1080, 1215, 1620, 1944, 2430, 3240, 4860, 9720, 13499, 26998, 40497, 53996, 67495, 80994, 107992, 121491, 134990, 161988, 202485, 242982, 269980, 323976, 364473, 404970, 485964, 539960, 607455, 728946, 809940, 971928, 1093419, 1214910, 1457892, 1619880, 1822365, 2186838, 2429820, 2915784, 3280257, 3644730, 4373676, 4859640, 5467095, 6560514, 7289460, 8747352, 10934190, 13121028, 14578920, 16401285, 21868380, 26242056, 32802570, 43736760, 65605140, 131210280]

約数ペア:
[(1, 131210280), (2, 65605140), (3, 43736760), (4, 32802570), (5, 26242056), (6, 21868380), (8, 16401285), (9, 14578920), (10, 13121028), (12, 10934190), (15, 8747352), (18, 7289460), (20, 6560514), (24, 5467095), (27, 4859640), (30, 4373676), (36, 3644730), (40, 3280257), (45, 2915784), (54, 2429820), (60, 2186838), (72, 1822365), (81, 1619880), (90, 1457892), (108, 1214910), (120, 1093419), (135, 971928), (162, 809940), (180, 728946), (216, 607455), (243, 539960), (270, 485964), (324, 404970), (360, 364473), (405, 323976), (486, 269980), (540, 242982), (648, 202485), (810, 161988), (972, 134990), (1080, 121491), (1215, 107992), (1620, 80994), (1944, 67495), (2430, 53996), (3240, 40497), (4860, 26998), (9720, 13499)]

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