18993947

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{229}}^1$

素因数の和:311

約数の個数: 24

約数和(自身を含む): 23724960

約数和(自身を除く): 4731013

約数列:

[1, 7, 17, 41, 119, 229, 287, 289, 697, 1603, 2023, 3893, 4879, 9389, 11849, 27251, 65723, 66181, 82943, 159613, 463267, 1117291, 2713421, 18993947]

約数ペア:

[(1, 18993947), (7, 2713421), (17, 1117291), (41, 463267), (119, 159613), (229, 82943), (287, 66181), (289, 65723), (697, 27251), (1603, 11849), (2023, 9389), (3893, 4879)]