21000000608

素因数分解:

$2^5\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{611603}}^1$

素因数の和:611679

約数の個数: 48

約数和(自身を含む): 43925399280

約数和(自身を除く): 22925398672

約数列:

[1, 2, 4, 8, 16, 29, 32, 37, 58, 74, 116, 148, 232, 296, 464, 592, 928, 1073, 1184, 2146, 4292, 8584, 17168, 34336, 611603, 1223206, 2446412, 4892824, 9785648, 17736487, 19571296, 22629311, 35472974, 45258622, 70945948, 90517244, 141891896, 181034488, 283783792, 362068976, 567567584, 656250019, 724137952, 1312500038, 2625000076, 5250000152, 10500000304, 21000000608]

約数ペア:

[(1, 21000000608), (2, 10500000304), (4, 5250000152), (8, 2625000076), (16, 1312500038), (29, 724137952), (32, 656250019), (37, 567567584), (58, 362068976), (74, 283783792), (116, 181034488), (148, 141891896), (232, 90517244), (296, 70945948), (464, 45258622), (592, 35472974), (928, 22629311), (1073, 19571296), (1184, 17736487), (2146, 9785648), (4292, 4892824), (8584, 2446412), (17168, 1223206), (34336, 611603)]