18999421

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:193

約数の個数: 32

約数和(自身を含む): 24330240

約数和(自身を除く): 5330819

約数列:

[1, 7, 17, 43, 47, 79, 119, 301, 329, 553, 731, 799, 1343, 2021, 3397, 3713, 5117, 5593, 9401, 14147, 23779, 25991, 34357, 57749, 63121, 159659, 240499, 404243, 441847, 1117613, 2714203, 18999421]

約数ペア:

[(1, 18999421), (7, 2714203), (17, 1117613), (43, 441847), (47, 404243), (79, 240499), (119, 159659), (301, 63121), (329, 57749), (553, 34357), (731, 25991), (799, 23779), (1343, 14147), (2021, 9401), (3397, 5593), (3713, 5117)]