28020573

素因数分解:

$3^6\times 7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:78

約数の個数: 84

約数和(自身を含む): 53688160

約数和(自身を除く): 25667587

約数列:

[1, 3, 7, 9, 17, 19, 21, 27, 51, 57, 63, 81, 119, 133, 153, 171, 189, 243, 289, 323, 357, 399, 459, 513, 567, 729, 867, 969, 1071, 1197, 1377, 1539, 1701, 2023, 2261, 2601, 2907, 3213, 3591, 4131, 4617, 5103, 5491, 6069, 6783, 7803, 8721, 9639, 10773, 12393, 13851, 16473, 18207, 20349, 23409, 26163, 28917, 32319, 38437, 49419, 54621, 61047, 70227, 78489, 86751, 96957, 115311, 148257, 163863, 183141, 210681, 235467, 345933, 444771, 491589, 549423, 1037799, 1334313, 1474767, 1648269, 3113397, 4002939, 9340191, 28020573]

約数ペア:

[(1, 28020573), (3, 9340191), (7, 4002939), (9, 3113397), (17, 1648269), (19, 1474767), (21, 1334313), (27, 1037799), (51, 549423), (57, 491589), (63, 444771), (81, 345933), (119, 235467), (133, 210681), (153, 183141), (171, 163863), (189, 148257), (243, 115311), (289, 96957), (323, 86751), (357, 78489), (399, 70227), (459, 61047), (513, 54621), (567, 49419), (729, 38437), (867, 32319), (969, 28917), (1071, 26163), (1197, 23409), (1377, 20349), (1539, 18207), (1701, 16473), (2023, 13851), (2261, 12393), (2601, 10773), (2907, 9639), (3213, 8721), (3591, 7803), (4131, 6783), (4617, 6069), (5103, 5491)]