21000261825

素因数分解:

$3^3\times 5^2\times {\mathrm{113}}^1\times {\mathrm{275323}}^1$

素因数の和:275455

約数の個数: 48

約数和(自身を含む): 38919800640

約数和(自身を除く): 17919538815

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 113, 135, 225, 339, 565, 675, 1017, 1695, 2825, 3051, 5085, 8475, 15255, 25425, 76275, 275323, 825969, 1376615, 2477907, 4129845, 6883075, 7433721, 12389535, 20649225, 31111499, 37168605, 61947675, 93334497, 155557495, 185843025, 280003491, 466672485, 777787475, 840010473, 1400017455, 2333362425, 4200052365, 7000087275, 21000261825]

約数ペア:

[(1, 21000261825), (3, 7000087275), (5, 4200052365), (9, 2333362425), (15, 1400017455), (25, 840010473), (27, 777787475), (45, 466672485), (75, 280003491), (113, 185843025), (135, 155557495), (225, 93334497), (339, 61947675), (565, 37168605), (675, 31111499), (1017, 20649225), (1695, 12389535), (2825, 7433721), (3051, 6883075), (5085, 4129845), (8475, 2477907), (15255, 1376615), (25425, 825969), (76275, 275323)]