About the Number

129381280

129381279 ← → 129381281

2進数表記:111101101100011001110100000

漢数字表記:一億二千九百三十八万千二百八十

素因数分解:

2 5 × 5 1 × 7 1 × 331 1 × 349 1

素因数の和:702
約数の個数: 96
約数和(自身を含む): 351388800
約数和(自身を除く): 222007520

約数列:
[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 331, 349, 560, 662, 698, 1120, 1324, 1396, 1655, 1745, 2317, 2443, 2648, 2792, 3310, 3490, 4634, 4886, 5296, 5584, 6620, 6980, 9268, 9772, 10592, 11168, 11585, 12215, 13240, 13960, 18536, 19544, 23170, 24430, 26480, 27920, 37072, 39088, 46340, 48860, 52960, 55840, 74144, 78176, 92680, 97720, 115519, 185360, 195440, 231038, 370720, 390880, 462076, 577595, 808633, 924152, 1155190, 1617266, 1848304, 2310380, 3234532, 3696608, 4043165, 4620760, 6469064, 8086330, 9241520, 12938128, 16172660, 18483040, 25876256, 32345320, 64690640, 129381280]

約数ペア:
[(1, 129381280), (2, 64690640), (4, 32345320), (5, 25876256), (7, 18483040), (8, 16172660), (10, 12938128), (14, 9241520), (16, 8086330), (20, 6469064), (28, 4620760), (32, 4043165), (35, 3696608), (40, 3234532), (56, 2310380), (70, 1848304), (80, 1617266), (112, 1155190), (140, 924152), (160, 808633), (224, 577595), (280, 462076), (331, 390880), (349, 370720), (560, 231038), (662, 195440), (698, 185360), (1120, 115519), (1324, 97720), (1396, 92680), (1655, 78176), (1745, 74144), (2317, 55840), (2443, 52960), (2648, 48860), (2792, 46340), (3310, 39088), (3490, 37072), (4634, 27920), (4886, 26480), (5296, 24430), (5584, 23170), (6620, 19544), (6980, 18536), (9268, 13960), (9772, 13240), (10592, 12215), (11168, 11585)]

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