21905877

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1427}}^1$

素因数の和:1497

約数の個数: 32

約数和(自身を含む): 36191232

約数和(自身を除く): 14285355

約数列:

[1, 3, 7, 17, 21, 43, 51, 119, 129, 301, 357, 731, 903, 1427, 2193, 4281, 5117, 9989, 15351, 24259, 29967, 61361, 72777, 169813, 184083, 429527, 509439, 1043137, 1288581, 3129411, 7301959, 21905877]

約数ペア:

[(1, 21905877), (3, 7301959), (7, 3129411), (17, 1288581), (21, 1043137), (43, 509439), (51, 429527), (119, 184083), (129, 169813), (301, 72777), (357, 61361), (731, 29967), (903, 24259), (1427, 15351), (2193, 9989), (4281, 5117)]