21390699

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{17519}}^1$

素因数の和:17570

約数の個数: 16

約数和(自身を含む): 31956480

約数和(自身を除く): 10565781

約数列:

[1, 3, 11, 33, 37, 111, 407, 1221, 17519, 52557, 192709, 578127, 648203, 1944609, 7130233, 21390699]

約数ペア:

[(1, 21390699), (3, 7130233), (11, 1944609), (33, 648203), (37, 578127), (111, 192709), (407, 52557), (1221, 17519)]