About the Number

131209680

131209679 ← → 131209681

2進数表記:111110100100001100111010000

漢数字表記:一億三千百二十万九千六百八十

素因数分解:

2 4 × 3 1 × 5 1 × 7 1 × 78101 1

素因数の和:78124
約数の個数: 80
約数和(自身を含む): 464863104
約数和(自身を除く): 333653424

約数列:
[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 78101, 156202, 234303, 312404, 390505, 468606, 546707, 624808, 781010, 937212, 1093414, 1171515, 1249616, 1562020, 1640121, 1874424, 2186828, 2343030, 2733535, 3124040, 3280242, 3748848, 4373656, 4686060, 5467070, 6248080, 6560484, 8200605, 8747312, 9372120, 10934140, 13120968, 16401210, 18744240, 21868280, 26241936, 32802420, 43736560, 65604840, 131209680]

約数ペア:
[(1, 131209680), (2, 65604840), (3, 43736560), (4, 32802420), (5, 26241936), (6, 21868280), (7, 18744240), (8, 16401210), (10, 13120968), (12, 10934140), (14, 9372120), (15, 8747312), (16, 8200605), (20, 6560484), (21, 6248080), (24, 5467070), (28, 4686060), (30, 4373656), (35, 3748848), (40, 3280242), (42, 3124040), (48, 2733535), (56, 2343030), (60, 2186828), (70, 1874424), (80, 1640121), (84, 1562020), (105, 1249616), (112, 1171515), (120, 1093414), (140, 937212), (168, 781010), (210, 624808), (240, 546707), (280, 468606), (336, 390505), (420, 312404), (560, 234303), (840, 156202), (1680, 78101)]

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