21872079

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{18839}}^1$

素因数の和:18891

約数の個数: 16

約数和(自身を含む): 33158400

約数和(自身を除く): 11286321

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 18839, 56517, 169551, 508653, 810077, 2430231, 7290693, 21872079]

約数ペア:

[(1, 21872079), (3, 7290693), (9, 2430231), (27, 810077), (43, 508653), (129, 169551), (387, 56517), (1161, 18839)]