21957243

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{367}}^1$

素因数の和:432

約数の個数: 48

約数和(自身を含む): 38260224

約数和(自身を除く): 16302981

約数列:

[1, 3, 7, 11, 21, 33, 37, 49, 77, 111, 147, 231, 259, 367, 407, 539, 777, 1101, 1221, 1617, 1813, 2569, 2849, 4037, 5439, 7707, 8547, 12111, 13579, 17983, 19943, 28259, 40737, 53949, 59829, 84777, 95053, 149369, 197813, 285159, 448107, 593439, 665371, 1045583, 1996113, 3136749, 7319081, 21957243]

約数ペア:

[(1, 21957243), (3, 7319081), (7, 3136749), (11, 1996113), (21, 1045583), (33, 665371), (37, 593439), (49, 448107), (77, 285159), (111, 197813), (147, 149369), (231, 95053), (259, 84777), (367, 59829), (407, 53949), (539, 40737), (777, 28259), (1101, 19943), (1221, 17983), (1617, 13579), (1813, 12111), (2569, 8547), (2849, 7707), (4037, 5439)]