18520497

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{277}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 31224960

約数和(自身を除く): 12704463

約数列:

[1, 3, 9, 17, 19, 23, 51, 57, 69, 153, 171, 207, 277, 323, 391, 437, 831, 969, 1173, 1311, 2493, 2907, 3519, 3933, 4709, 5263, 6371, 7429, 14127, 15789, 19113, 22287, 42381, 47367, 57339, 66861, 89471, 108307, 121049, 268413, 324921, 363147, 805239, 974763, 1089441, 2057833, 6173499, 18520497]

約数ペア:

[(1, 18520497), (3, 6173499), (9, 2057833), (17, 1089441), (19, 974763), (23, 805239), (51, 363147), (57, 324921), (69, 268413), (153, 121049), (171, 108307), (207, 89471), (277, 66861), (323, 57339), (391, 47367), (437, 42381), (831, 22287), (969, 19113), (1173, 15789), (1311, 14127), (2493, 7429), (2907, 6371), (3519, 5263), (3933, 4709)]