18991594

素因数分解:

$2^1\times {\mathrm{131}}^1\times {\mathrm{173}}^1\times {\mathrm{419}}^1$

素因数の和:725

約数の個数: 16

約数和(自身を含む): 28939680

約数和(自身を除く): 9948086

約数列:

[1, 2, 131, 173, 262, 346, 419, 838, 22663, 45326, 54889, 72487, 109778, 144974, 9495797, 18991594]

約数ペア:

[(1, 18991594), (2, 9495797), (131, 144974), (173, 109778), (262, 72487), (346, 54889), (419, 45326), (838, 22663)]