20723901

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:142

約数の個数: 48

約数和(自身を含む): 33421248

約数和(自身を除く): 12697347

約数列:

[1, 3, 11, 17, 33, 41, 51, 53, 123, 159, 187, 289, 451, 561, 583, 697, 867, 901, 1353, 1749, 2091, 2173, 2703, 3179, 6519, 7667, 9537, 9911, 11849, 15317, 23001, 23903, 29733, 35547, 36941, 45951, 71709, 110823, 130339, 168487, 391017, 406351, 505461, 627997, 1219053, 1883991, 6907967, 20723901]

約数ペア:

[(1, 20723901), (3, 6907967), (11, 1883991), (17, 1219053), (33, 627997), (41, 505461), (51, 406351), (53, 391017), (123, 168487), (159, 130339), (187, 110823), (289, 71709), (451, 45951), (561, 36941), (583, 35547), (697, 29733), (867, 23903), (901, 23001), (1353, 15317), (1749, 11849), (2091, 9911), (2173, 9537), (2703, 7667), (3179, 6519)]