About the Number

84971991

84971990 ← → 84971992

2進数表記:101000100001001000111010111

漢数字表記:八千四百九十七万千九百九十一

素因数分解:

3 1 × 13 1 × 1307 1 × 1667 1

素因数の和:2990
約数の個数: 16
約数和(自身を含む): 122177664
約数和(自身を除く): 37205673

約数列:
[1, 3, 13, 39, 1307, 1667, 3921, 5001, 16991, 21671, 50973, 65013, 2178769, 6536307, 28323997, 84971991]

約数ペア:
[(1, 84971991), (3, 28323997), (13, 6536307), (39, 2178769), (1307, 65013), (1667, 50973), (3921, 21671), (5001, 16991)]

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