20656989

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 33611760

約数和(自身を除く): 12954771

約数列:

[1, 3, 9, 17, 37, 41, 51, 89, 111, 123, 153, 267, 333, 369, 629, 697, 801, 1513, 1517, 1887, 2091, 3293, 3649, 4539, 4551, 5661, 6273, 9879, 10947, 13617, 13653, 25789, 29637, 32841, 55981, 62033, 77367, 135013, 167943, 186099, 232101, 405039, 503829, 558297, 1215117, 2295221, 6885663, 20656989]

約数ペア:

[(1, 20656989), (3, 6885663), (9, 2295221), (17, 1215117), (37, 558297), (41, 503829), (51, 405039), (89, 232101), (111, 186099), (123, 167943), (153, 135013), (267, 77367), (333, 62033), (369, 55981), (629, 32841), (697, 29637), (801, 25789), (1513, 13653), (1517, 13617), (1887, 10947), (2091, 9879), (3293, 6273), (3649, 5661), (4539, 4551)]