About the Number

12789990

12789989 ← → 12789991

2進数表記:110000110010100011100110

漢数字表記:千二百七十八万九千九百九十

素因数分解:

2 1 × 3 2 × 5 1 × 142111 1

素因数の和:142124
約数の個数: 24
約数和(自身を含む): 33254208
約数和(自身を除く): 20464218

約数列:
[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 142111, 284222, 426333, 710555, 852666, 1278999, 1421110, 2131665, 2557998, 4263330, 6394995, 12789990]

約数ペア:
[(1, 12789990), (2, 6394995), (3, 4263330), (5, 2557998), (6, 2131665), (9, 1421110), (10, 1278999), (15, 852666), (18, 710555), (30, 426333), (45, 284222), (90, 142111)]

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