19958020

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1009}}^1$

素因数の和:1084

約数の個数: 48

約数和(自身を含む): 44795520

約数和(自身を除く): 24837500

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1009, 1978, 2018, 3956, 4036, 4945, 5045, 9890, 10090, 19780, 20180, 23207, 43387, 46414, 86774, 92828, 116035, 173548, 216935, 232070, 433870, 464140, 867740, 997901, 1995802, 3991604, 4989505, 9979010, 19958020]

約数ペア:

[(1, 19958020), (2, 9979010), (4, 4989505), (5, 3991604), (10, 1995802), (20, 997901), (23, 867740), (43, 464140), (46, 433870), (86, 232070), (92, 216935), (115, 173548), (172, 116035), (215, 92828), (230, 86774), (430, 46414), (460, 43387), (860, 23207), (989, 20180), (1009, 19780), (1978, 10090), (2018, 9890), (3956, 5045), (4036, 4945)]