About the Number

21181740

21181739 ← → 21181741

2進数表記:1010000110011010100101100

漢数字表記:二千百十八万千七百四十

素因数分解:

2 2 × 3 1 × 5 1 × 491 1 × 719 1

素因数の和:1222
約数の個数: 48
約数和(自身を含む): 59512320
約数和(自身を除く): 38330580

約数列:
[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 491, 719, 982, 1438, 1473, 1964, 2157, 2455, 2876, 2946, 3595, 4314, 4910, 5892, 7190, 7365, 8628, 9820, 10785, 14380, 14730, 21570, 29460, 43140, 353029, 706058, 1059087, 1412116, 1765145, 2118174, 3530290, 4236348, 5295435, 7060580, 10590870, 21181740]

約数ペア:
[(1, 21181740), (2, 10590870), (3, 7060580), (4, 5295435), (5, 4236348), (6, 3530290), (10, 2118174), (12, 1765145), (15, 1412116), (20, 1059087), (30, 706058), (60, 353029), (491, 43140), (719, 29460), (982, 21570), (1438, 14730), (1473, 14380), (1964, 10785), (2157, 9820), (2455, 8628), (2876, 7365), (2946, 7190), (3595, 5892), (4314, 4910)]

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