21340341

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{557}}^1$

素因数の和:623

約数の個数: 40

約数和(自身を含む): 35649504

約数和(自身を除く): 14309163

約数列:

[1, 3, 9, 11, 27, 33, 43, 81, 99, 129, 297, 387, 473, 557, 891, 1161, 1419, 1671, 3483, 4257, 5013, 6127, 12771, 15039, 18381, 23951, 38313, 45117, 55143, 71853, 165429, 215559, 263461, 496287, 646677, 790383, 1940031, 2371149, 7113447, 21340341]

約数ペア:

[(1, 21340341), (3, 7113447), (9, 2371149), (11, 1940031), (27, 790383), (33, 646677), (43, 496287), (81, 263461), (99, 215559), (129, 165429), (297, 71853), (387, 55143), (473, 45117), (557, 38313), (891, 23951), (1161, 18381), (1419, 15039), (1671, 12771), (3483, 6127), (4257, 5013)]