20812708

素因数分解:

$2^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{97}}^2$

素因数の和:284

約数の個数: 36

約数和(自身を含む): 42591360

約数和(自身を除く): 21778652

約数列:

[1, 2, 4, 7, 14, 28, 79, 97, 158, 194, 316, 388, 553, 679, 1106, 1358, 2212, 2716, 7663, 9409, 15326, 18818, 30652, 37636, 53641, 65863, 107282, 131726, 214564, 263452, 743311, 1486622, 2973244, 5203177, 10406354, 20812708]

約数ペア:

[(1, 20812708), (2, 10406354), (4, 5203177), (7, 2973244), (14, 1486622), (28, 743311), (79, 263452), (97, 214564), (158, 131726), (194, 107282), (316, 65863), (388, 53641), (553, 37636), (679, 30652), (1106, 18818), (1358, 15326), (2212, 9409), (2716, 7663)]