21357831

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{3461}}^1$

素因数の和:3503

約数の個数: 24

約数和(自身を含む): 33152112

約数和(自身を除く): 11794281

約数列:

[1, 3, 11, 17, 33, 51, 121, 187, 363, 561, 2057, 3461, 6171, 10383, 38071, 58837, 114213, 176511, 418781, 647207, 1256343, 1941621, 7119277, 21357831]

約数ペア:

[(1, 21357831), (3, 7119277), (11, 1941621), (17, 1256343), (33, 647207), (51, 418781), (121, 176511), (187, 114213), (363, 58837), (561, 38071), (2057, 10383), (3461, 6171)]