21793131

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{6257}}^1$

素因数の和:6312

約数の個数: 20

約数和(自身を含む): 33317592

約数和(自身を除く): 11524461

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 6257, 18771, 56313, 168939, 269051, 506817, 807153, 2421459, 7264377, 21793131]

約数ペア:

[(1, 21793131), (3, 7264377), (9, 2421459), (27, 807153), (43, 506817), (81, 269051), (129, 168939), (387, 56313), (1161, 18771), (3483, 6257)]