18215701

素因数分解:

$7^3\times {\mathrm{23}}^1\times {\mathrm{2309}}^1$

素因数の和:2353

約数の個数: 16

約数和(自身を含む): 22176000

約数和(自身を除く): 3960299

約数列:

[1, 7, 23, 49, 161, 343, 1127, 2309, 7889, 16163, 53107, 113141, 371749, 791987, 2602243, 18215701]

約数ペア:

[(1, 18215701), (7, 2602243), (23, 791987), (49, 371749), (161, 113141), (343, 53107), (1127, 16163), (2309, 7889)]