21391623

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{1249}}^1$

素因数の和:1439

約数の個数: 24

約数和(自身を含む): 33930000

約数和(自身を除く): 12538377

約数列:

[1, 3, 9, 11, 33, 99, 173, 519, 1249, 1557, 1903, 3747, 5709, 11241, 13739, 17127, 41217, 123651, 216077, 648231, 1944693, 2376847, 7130541, 21391623]

約数ペア:

[(1, 21391623), (3, 7130541), (9, 2376847), (11, 1944693), (33, 648231), (99, 216077), (173, 123651), (519, 41217), (1249, 17127), (1557, 13739), (1903, 11241), (3747, 5709)]