21726481

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:229

約数の個数: 32

約数和(自身を含む): 27878400

約数和(自身を除く): 6151919

約数列:

[1, 7, 19, 29, 43, 131, 133, 203, 301, 551, 817, 917, 1247, 2489, 3799, 3857, 5633, 5719, 8729, 17423, 23693, 26593, 39431, 72181, 107027, 163357, 165851, 505267, 749189, 1143499, 3103783, 21726481]

約数ペア:

[(1, 21726481), (7, 3103783), (19, 1143499), (29, 749189), (43, 505267), (131, 165851), (133, 163357), (203, 107027), (301, 72181), (551, 39431), (817, 26593), (917, 23693), (1247, 17423), (2489, 8729), (3799, 5719), (3857, 5633)]