21758989

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{449}}^1$

素因数の和:529

約数の個数: 24

約数和(自身を含む): 27086400

約数和(自身を除く): 5327411

約数列:

[1, 7, 23, 43, 49, 161, 301, 449, 989, 1127, 2107, 3143, 6923, 10327, 19307, 22001, 48461, 72289, 135149, 444061, 506023, 946043, 3108427, 21758989]

約数ペア:

[(1, 21758989), (7, 3108427), (23, 946043), (43, 506023), (49, 444061), (161, 135149), (301, 72289), (449, 48461), (989, 22001), (1127, 19307), (2107, 10327), (3143, 6923)]