20911142

素因数分解:

$2^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:205

約数の個数: 48

約数和(自身を含む): 38468160

約数和(自身を除く): 17557018

約数列:

[1, 2, 7, 14, 37, 49, 73, 74, 79, 98, 146, 158, 259, 511, 518, 553, 1022, 1106, 1813, 2701, 2923, 3577, 3626, 3871, 5402, 5767, 5846, 7154, 7742, 11534, 18907, 20461, 37814, 40369, 40922, 80738, 132349, 143227, 213379, 264698, 282583, 286454, 426758, 565166, 1493653, 2987306, 10455571, 20911142]

約数ペア:

[(1, 20911142), (2, 10455571), (7, 2987306), (14, 1493653), (37, 565166), (49, 426758), (73, 286454), (74, 282583), (79, 264698), (98, 213379), (146, 143227), (158, 132349), (259, 80738), (511, 40922), (518, 40369), (553, 37814), (1022, 20461), (1106, 18907), (1813, 11534), (2701, 7742), (2923, 7154), (3577, 5846), (3626, 5767), (3871, 5402)]