19886812

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{457}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 40626432

約数和(自身を除く): 20739620

約数列:

[1, 2, 4, 11, 22, 23, 43, 44, 46, 86, 92, 172, 253, 457, 473, 506, 914, 946, 989, 1012, 1828, 1892, 1978, 3956, 5027, 10054, 10511, 10879, 19651, 20108, 21022, 21758, 39302, 42044, 43516, 78604, 115621, 216161, 231242, 432322, 451973, 462484, 864644, 903946, 1807892, 4971703, 9943406, 19886812]

約数ペア:

[(1, 19886812), (2, 9943406), (4, 4971703), (11, 1807892), (22, 903946), (23, 864644), (43, 462484), (44, 451973), (46, 432322), (86, 231242), (92, 216161), (172, 115621), (253, 78604), (457, 43516), (473, 42044), (506, 39302), (914, 21758), (946, 21022), (989, 20108), (1012, 19651), (1828, 10879), (1892, 10511), (1978, 10054), (3956, 5027)]