18878992

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1601}}^1$

素因数の和:1687

約数の個数: 40

約数和(自身を含む): 40524192

約数和(自身を除く): 21645200

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 67, 88, 134, 176, 268, 536, 737, 1072, 1474, 1601, 2948, 3202, 5896, 6404, 11792, 12808, 17611, 25616, 35222, 70444, 107267, 140888, 214534, 281776, 429068, 858136, 1179937, 1716272, 2359874, 4719748, 9439496, 18878992]

約数ペア:

[(1, 18878992), (2, 9439496), (4, 4719748), (8, 2359874), (11, 1716272), (16, 1179937), (22, 858136), (44, 429068), (67, 281776), (88, 214534), (134, 140888), (176, 107267), (268, 70444), (536, 35222), (737, 25616), (1072, 17611), (1474, 12808), (1601, 11792), (2948, 6404), (3202, 5896)]