21028469

素因数分解:

$7^1\times {\mathrm{11}}^3\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:138

約数の個数: 32

約数和(自身を含む): 27593472

約数和(自身を除く): 6565003

約数列:

[1, 7, 11, 37, 61, 77, 121, 259, 407, 427, 671, 847, 1331, 2257, 2849, 4477, 4697, 7381, 9317, 15799, 24827, 31339, 49247, 51667, 81191, 173789, 273097, 344729, 568337, 1911679, 3004067, 21028469]

約数ペア:

[(1, 21028469), (7, 3004067), (11, 1911679), (37, 568337), (61, 344729), (77, 273097), (121, 173789), (259, 81191), (407, 51667), (427, 49247), (671, 31339), (847, 24827), (1331, 15799), (2257, 9317), (2849, 7381), (4477, 4697)]