About the Number

20947005

20947004 ← → 20947006

2進数表記:1001111111010000000111101

漢数字表記:二千九十四万七千五

素因数分解:

3 4 × 5 1 × 51721 1

素因数の和:51738
約数の個数: 20
約数和(自身を含む): 37550172
約数和(自身を除く): 16603167

約数列:
[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51721, 155163, 258605, 465489, 775815, 1396467, 2327445, 4189401, 6982335, 20947005]

約数ペア:
[(1, 20947005), (3, 6982335), (5, 4189401), (9, 2327445), (15, 1396467), (27, 775815), (45, 465489), (81, 258605), (135, 155163), (405, 51721)]

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