21381003

素因数分解:

$3^4\times 7^2\times {\mathrm{5387}}^1$

素因数の和:5413

約数の個数: 30

約数和(自身を含む): 37161036

約数和(自身を除く): 15780033

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 5387, 16161, 37709, 48483, 113127, 145449, 263963, 339381, 436347, 791889, 1018143, 2375667, 3054429, 7127001, 21381003]

約数ペア:

[(1, 21381003), (3, 7127001), (7, 3054429), (9, 2375667), (21, 1018143), (27, 791889), (49, 436347), (63, 339381), (81, 263963), (147, 145449), (189, 113127), (441, 48483), (567, 37709), (1323, 16161), (3969, 5387)]