21123784

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{240043}}^1$

素因数の和:240060

約数の個数: 16

約数和(自身を含む): 43207920

約数和(自身を除く): 22084136

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 240043, 480086, 960172, 1920344, 2640473, 5280946, 10561892, 21123784]

約数ペア:

[(1, 21123784), (2, 10561892), (4, 5280946), (8, 2640473), (11, 1920344), (22, 960172), (44, 480086), (88, 240043)]