21377824

素因数分解:

$2^5\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:162

約数の個数: 72

約数和(自身を含む): 47038320

約数和(自身を除く): 25660496

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 59, 67, 104, 118, 134, 169, 208, 236, 268, 338, 416, 472, 536, 676, 767, 871, 944, 1072, 1352, 1534, 1742, 1888, 2144, 2704, 3068, 3484, 3953, 5408, 6136, 6968, 7906, 9971, 11323, 12272, 13936, 15812, 19942, 22646, 24544, 27872, 31624, 39884, 45292, 51389, 63248, 79768, 90584, 102778, 126496, 159536, 181168, 205556, 319072, 362336, 411112, 668057, 822224, 1336114, 1644448, 2672228, 5344456, 10688912, 21377824]

約数ペア:

[(1, 21377824), (2, 10688912), (4, 5344456), (8, 2672228), (13, 1644448), (16, 1336114), (26, 822224), (32, 668057), (52, 411112), (59, 362336), (67, 319072), (104, 205556), (118, 181168), (134, 159536), (169, 126496), (208, 102778), (236, 90584), (268, 79768), (338, 63248), (416, 51389), (472, 45292), (536, 39884), (676, 31624), (767, 27872), (871, 24544), (944, 22646), (1072, 19942), (1352, 15812), (1534, 13936), (1742, 12272), (1888, 11323), (2144, 9971), (2704, 7906), (3068, 6968), (3484, 6136), (3953, 5408)]