21995127

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1867}}^1$

素因数の和:1908

約数の個数: 48

約数和(自身を含む): 41962752

約数和(自身を除く): 19967625

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 51, 63, 77, 99, 119, 153, 187, 231, 357, 561, 693, 1071, 1309, 1683, 1867, 3927, 5601, 11781, 13069, 16803, 20537, 31739, 39207, 61611, 95217, 117621, 143759, 184833, 222173, 285651, 349129, 431277, 666519, 1047387, 1293831, 1999557, 2443903, 3142161, 7331709, 21995127]

約数ペア:

[(1, 21995127), (3, 7331709), (7, 3142161), (9, 2443903), (11, 1999557), (17, 1293831), (21, 1047387), (33, 666519), (51, 431277), (63, 349129), (77, 285651), (99, 222173), (119, 184833), (153, 143759), (187, 117621), (231, 95217), (357, 61611), (561, 39207), (693, 31739), (1071, 20537), (1309, 16803), (1683, 13069), (1867, 11781), (3927, 5601)]