21305774

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{521}}^1$

素因数の和:680

約数の個数: 32

約数和(自身を含む): 38486016

約数和(自身を除く): 17180242

約数列:

[1, 2, 7, 14, 23, 46, 127, 161, 254, 322, 521, 889, 1042, 1778, 2921, 3647, 5842, 7294, 11983, 20447, 23966, 40894, 66167, 83881, 132334, 167762, 463169, 926338, 1521841, 3043682, 10652887, 21305774]

約数ペア:

[(1, 21305774), (2, 10652887), (7, 3043682), (14, 1521841), (23, 926338), (46, 463169), (127, 167762), (161, 132334), (254, 83881), (322, 66167), (521, 40894), (889, 23966), (1042, 20447), (1778, 11983), (2921, 7294), (3647, 5842)]