21154644

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{661}}^1$

素因数の和:805

約数の個数: 72

約数和(自身を含む): 61687808

約数和(自身を除く): 40533164

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 127, 252, 254, 381, 508, 661, 762, 889, 1143, 1322, 1524, 1778, 1983, 2286, 2644, 2667, 3556, 3966, 4572, 4627, 5334, 5949, 7932, 8001, 9254, 10668, 11898, 13881, 16002, 18508, 23796, 27762, 32004, 41643, 55524, 83286, 83947, 166572, 167894, 251841, 335788, 503682, 587629, 755523, 1007364, 1175258, 1511046, 1762887, 2350516, 3022092, 3525774, 5288661, 7051548, 10577322, 21154644]

約数ペア:

[(1, 21154644), (2, 10577322), (3, 7051548), (4, 5288661), (6, 3525774), (7, 3022092), (9, 2350516), (12, 1762887), (14, 1511046), (18, 1175258), (21, 1007364), (28, 755523), (36, 587629), (42, 503682), (63, 335788), (84, 251841), (126, 167894), (127, 166572), (252, 83947), (254, 83286), (381, 55524), (508, 41643), (661, 32004), (762, 27762), (889, 23796), (1143, 18508), (1322, 16002), (1524, 13881), (1778, 11898), (1983, 10668), (2286, 9254), (2644, 8001), (2667, 7932), (3556, 5949), (3966, 5334), (4572, 4627)]