21123718

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1879}}^1$

素因数の和:1972

約数の個数: 32

約数和(自身を含む): 40066560

約数和(自身を除く): 18942842

約数列:

[1, 2, 7, 11, 14, 22, 73, 77, 146, 154, 511, 803, 1022, 1606, 1879, 3758, 5621, 11242, 13153, 20669, 26306, 41338, 137167, 144683, 274334, 289366, 960169, 1508837, 1920338, 3017674, 10561859, 21123718]

約数ペア:

[(1, 21123718), (2, 10561859), (7, 3017674), (11, 1920338), (14, 1508837), (22, 960169), (73, 289366), (77, 274334), (146, 144683), (154, 137167), (511, 41338), (803, 26306), (1022, 20669), (1606, 13153), (1879, 11242), (3758, 5621)]