21820708

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{397}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 47428864

約数和(自身を除く): 25608156

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 151, 182, 302, 364, 397, 604, 794, 1057, 1588, 1963, 2114, 2779, 3926, 4228, 5161, 5558, 7852, 10322, 11116, 13741, 20644, 27482, 36127, 54964, 59947, 72254, 119894, 144508, 239788, 419629, 779311, 839258, 1558622, 1678516, 3117244, 5455177, 10910354, 21820708]

約数ペア:

[(1, 21820708), (2, 10910354), (4, 5455177), (7, 3117244), (13, 1678516), (14, 1558622), (26, 839258), (28, 779311), (52, 419629), (91, 239788), (151, 144508), (182, 119894), (302, 72254), (364, 59947), (397, 54964), (604, 36127), (794, 27482), (1057, 20644), (1588, 13741), (1963, 11116), (2114, 10322), (2779, 7852), (3926, 5558), (4228, 5161)]