21705719

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{1019}}^1$

素因数の和:1222

約数の個数: 16

約数和(自身を含む): 26438400

約数和(自身を除く): 4732681

約数列:

[1, 7, 17, 119, 179, 1019, 1253, 3043, 7133, 17323, 21301, 121261, 182401, 1276807, 3100817, 21705719]

約数ペア:

[(1, 21705719), (7, 3100817), (17, 1276807), (119, 182401), (179, 121261), (1019, 21301), (1253, 17323), (3043, 7133)]