About the Number

19980448

19980447 ← → 19980449

2進数表記:1001100001110000010100000

漢数字表記:千九百九十八万四百四十八

素因数分解:

2 5 × 41 1 × 97 1 × 157 1

素因数の和:305
約数の個数: 48
約数和(自身を含む): 40970664
約数和(自身を除く): 20990216

約数列:
[1, 2, 4, 8, 16, 32, 41, 82, 97, 157, 164, 194, 314, 328, 388, 628, 656, 776, 1256, 1312, 1552, 2512, 3104, 3977, 5024, 6437, 7954, 12874, 15229, 15908, 25748, 30458, 31816, 51496, 60916, 63632, 102992, 121832, 127264, 205984, 243664, 487328, 624389, 1248778, 2497556, 4995112, 9990224, 19980448]

約数ペア:
[(1, 19980448), (2, 9990224), (4, 4995112), (8, 2497556), (16, 1248778), (32, 624389), (41, 487328), (82, 243664), (97, 205984), (157, 127264), (164, 121832), (194, 102992), (314, 63632), (328, 60916), (388, 51496), (628, 31816), (656, 30458), (776, 25748), (1256, 15908), (1312, 15229), (1552, 12874), (2512, 7954), (3104, 6437), (3977, 5024)]

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