20912661

素因数分解:

$3^4\times 7^2\times {\mathrm{11}}^1\times {\mathrm{479}}^1$

素因数の和:516

約数の個数: 60

約数和(自身を含む): 39726720

約数和(自身を除く): 18814059

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 49, 63, 77, 81, 99, 147, 189, 231, 297, 441, 479, 539, 567, 693, 891, 1323, 1437, 1617, 2079, 3353, 3969, 4311, 4851, 5269, 6237, 10059, 12933, 14553, 15807, 23471, 30177, 36883, 38799, 43659, 47421, 70413, 90531, 110649, 142263, 211239, 258181, 271593, 331947, 426789, 633717, 774543, 995841, 1901151, 2323629, 2987523, 6970887, 20912661]

約数ペア:

[(1, 20912661), (3, 6970887), (7, 2987523), (9, 2323629), (11, 1901151), (21, 995841), (27, 774543), (33, 633717), (49, 426789), (63, 331947), (77, 271593), (81, 258181), (99, 211239), (147, 142263), (189, 110649), (231, 90531), (297, 70413), (441, 47421), (479, 43659), (539, 38799), (567, 36883), (693, 30177), (891, 23471), (1323, 15807), (1437, 14553), (1617, 12933), (2079, 10059), (3353, 6237), (3969, 5269), (4311, 4851)]