21356847

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{1741}}^1$

素因数の和:1823

約数の個数: 24

約数和(自身を含む): 32610240

約数和(自身を除く): 11253393

約数列:

[1, 3, 9, 29, 47, 87, 141, 261, 423, 1363, 1741, 4089, 5223, 12267, 15669, 50489, 81827, 151467, 245481, 454401, 736443, 2372983, 7118949, 21356847]

約数ペア:

[(1, 21356847), (3, 7118949), (9, 2372983), (29, 736443), (47, 454401), (87, 245481), (141, 151467), (261, 81827), (423, 50489), (1363, 15669), (1741, 12267), (4089, 5223)]