About the Number

199707921

199707920 ← → 199707922

2進数表記:1011111001110100110100010001

漢数字表記:一億九千九百七十万七千九百二十一

素因数分解:

3 2 × 7 1 × 31 1 × 293 1 × 349 1

素因数の和:686
約数の個数: 48
約数和(自身を含む): 342451200
約数和(自身を除く): 142743279

約数列:
[1, 3, 7, 9, 21, 31, 63, 93, 217, 279, 293, 349, 651, 879, 1047, 1953, 2051, 2443, 2637, 3141, 6153, 7329, 9083, 10819, 18459, 21987, 27249, 32457, 63581, 75733, 81747, 97371, 102257, 190743, 227199, 306771, 572229, 681597, 715799, 920313, 2147397, 3169967, 6442191, 9509901, 22189769, 28529703, 66569307, 199707921]

約数ペア:
[(1, 199707921), (3, 66569307), (7, 28529703), (9, 22189769), (21, 9509901), (31, 6442191), (63, 3169967), (93, 2147397), (217, 920313), (279, 715799), (293, 681597), (349, 572229), (651, 306771), (879, 227199), (1047, 190743), (1953, 102257), (2051, 97371), (2443, 81747), (2637, 75733), (3141, 63581), (6153, 32457), (7329, 27249), (9083, 21987), (10819, 18459)]

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