About the Number

12991040

12991039 ← → 12991041

2進数表記:110001100011101001000000

漢数字表記:千二百九十九万千四十

素因数分解:

2 6 × 5 1 × 40597 1

素因数の和:40614
約数の個数: 28
約数和(自身を含む): 30935676
約数和(自身を除く): 17944636

約数列:
[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 40597, 81194, 162388, 202985, 324776, 405970, 649552, 811940, 1299104, 1623880, 2598208, 3247760, 6495520, 12991040]

約数ペア:
[(1, 12991040), (2, 6495520), (4, 3247760), (5, 2598208), (8, 1623880), (10, 1299104), (16, 811940), (20, 649552), (32, 405970), (40, 324776), (64, 202985), (80, 162388), (160, 81194), (320, 40597)]

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