21008241

素因数分解:

$3^4\times {\mathrm{419}}^1\times {\mathrm{619}}^1$

素因数の和:1050

約数の個数: 20

約数和(自身を含む): 31508400

約数和(自身を除く): 10500159

約数列:

[1, 3, 9, 27, 81, 419, 619, 1257, 1857, 3771, 5571, 11313, 16713, 33939, 50139, 259361, 778083, 2334249, 7002747, 21008241]

約数ペア:

[(1, 21008241), (3, 7002747), (9, 2334249), (27, 778083), (81, 259361), (419, 50139), (619, 33939), (1257, 16713), (1857, 11313), (3771, 5571)]