About the Number

21978390

21978389 ← → 21978391

2進数表記:1010011110101110100010110

漢数字表記:二千百九十七万八千三百九十

素因数分解:

2 1 × 3 1 × 5 1 × 7 1 × 104659 1

素因数の和:104676
約数の個数: 32
約数和(自身を含む): 60284160
約数和(自身を除く): 38305770

約数列:
[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 104659, 209318, 313977, 523295, 627954, 732613, 1046590, 1465226, 1569885, 2197839, 3139770, 3663065, 4395678, 7326130, 10989195, 21978390]

約数ペア:
[(1, 21978390), (2, 10989195), (3, 7326130), (5, 4395678), (6, 3663065), (7, 3139770), (10, 2197839), (14, 1569885), (15, 1465226), (21, 1046590), (30, 732613), (35, 627954), (42, 523295), (70, 313977), (105, 209318), (210, 104659)]

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