21247184

素因数分解:

$2^4\times 7^2\times {\mathrm{41}}^1\times {\mathrm{661}}^1$

素因数の和:724

約数の個数: 60

約数和(自身を含む): 49129668

約数和(自身を除く): 27882484

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 41, 49, 56, 82, 98, 112, 164, 196, 287, 328, 392, 574, 656, 661, 784, 1148, 1322, 2009, 2296, 2644, 4018, 4592, 4627, 5288, 8036, 9254, 10576, 16072, 18508, 27101, 32144, 32389, 37016, 54202, 64778, 74032, 108404, 129556, 189707, 216808, 259112, 379414, 433616, 518224, 758828, 1327949, 1517656, 2655898, 3035312, 5311796, 10623592, 21247184]

約数ペア:

[(1, 21247184), (2, 10623592), (4, 5311796), (7, 3035312), (8, 2655898), (14, 1517656), (16, 1327949), (28, 758828), (41, 518224), (49, 433616), (56, 379414), (82, 259112), (98, 216808), (112, 189707), (164, 129556), (196, 108404), (287, 74032), (328, 64778), (392, 54202), (574, 37016), (656, 32389), (661, 32144), (784, 27101), (1148, 18508), (1322, 16072), (2009, 10576), (2296, 9254), (2644, 8036), (4018, 5288), (4592, 4627)]