18780938

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{19853}}^1$

素因数の和:19909

約数の個数: 16

約数和(自身を含む): 31448736

約数和(自身を除く): 12667798

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 19853, 39706, 218383, 436766, 853679, 1707358, 9390469, 18780938]

約数ペア:

[(1, 18780938), (2, 9390469), (11, 1707358), (22, 853679), (43, 436766), (86, 218383), (473, 39706), (946, 19853)]