About the Number

400901990

400901989 ← → 400901991

2進数表記:10111111001010100011101100110

漢数字表記:四億九十万千九百九十

素因数分解:

2 1 × 5 1 × 17 1 × 2358247 1

素因数の和:2358271
約数の個数: 16
約数和(自身を含む): 764072352
約数和(自身を除く): 363170362

約数列:
[1, 2, 5, 10, 17, 34, 85, 170, 2358247, 4716494, 11791235, 23582470, 40090199, 80180398, 200450995, 400901990]

約数ペア:
[(1, 400901990), (2, 200450995), (5, 80180398), (10, 40090199), (17, 23582470), (34, 11791235), (85, 4716494), (170, 2358247)]

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