20842731

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{499}}^1$

素因数の和:545

約数の個数: 64

約数和(自身を含む): 40320000

約数和(自身を除く): 19477269

約数列:

[1, 3, 7, 9, 13, 17, 21, 27, 39, 51, 63, 91, 117, 119, 153, 189, 221, 273, 351, 357, 459, 499, 663, 819, 1071, 1497, 1547, 1989, 2457, 3213, 3493, 4491, 4641, 5967, 6487, 8483, 10479, 13473, 13923, 19461, 25449, 31437, 41769, 45409, 58383, 59381, 76347, 94311, 110279, 136227, 175149, 178143, 229041, 330837, 408681, 534429, 771953, 992511, 1226043, 1603287, 2315859, 2977533, 6947577, 20842731]

約数ペア:

[(1, 20842731), (3, 6947577), (7, 2977533), (9, 2315859), (13, 1603287), (17, 1226043), (21, 992511), (27, 771953), (39, 534429), (51, 408681), (63, 330837), (91, 229041), (117, 178143), (119, 175149), (153, 136227), (189, 110279), (221, 94311), (273, 76347), (351, 59381), (357, 58383), (459, 45409), (499, 41769), (663, 31437), (819, 25449), (1071, 19461), (1497, 13923), (1547, 13473), (1989, 10479), (2457, 8483), (3213, 6487), (3493, 5967), (4491, 4641)]