About the Number

309702980

309702979 ← → 309702981

2進数表記:10010011101011011000101000100

漢数字表記:三億九百七十万二千九百八十

素因数分解:

2 2 × 5 1 × 409 1 × 37861 1

素因数の和:38279
約数の個数: 24
約数和(自身を含む): 651983640
約数和(自身を除く): 342280660

約数列:
[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 8180, 37861, 75722, 151444, 189305, 378610, 757220, 15485149, 30970298, 61940596, 77425745, 154851490, 309702980]

約数ペア:
[(1, 309702980), (2, 154851490), (4, 77425745), (5, 61940596), (10, 30970298), (20, 15485149), (409, 757220), (818, 378610), (1636, 189305), (2045, 151444), (4090, 75722), (8180, 37861)]

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