21150711

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^2$

素因数の和:164

約数の個数: 36

約数和(自身を含む): 33074496

約数和(自身を除く): 11923785

約数列:

[1, 3, 9, 31, 41, 43, 93, 123, 129, 279, 369, 387, 1271, 1333, 1763, 1849, 3813, 3999, 5289, 5547, 11439, 11997, 15867, 16641, 54653, 57319, 75809, 163959, 171957, 227427, 491877, 515871, 682281, 2350079, 7050237, 21150711]

約数ペア:

[(1, 21150711), (3, 7050237), (9, 2350079), (31, 682281), (41, 515871), (43, 491877), (93, 227427), (123, 171957), (129, 163959), (279, 75809), (369, 57319), (387, 54653), (1271, 16641), (1333, 15867), (1763, 11997), (1849, 11439), (3813, 5547), (3999, 5289)]