21377321

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:189

約数の個数: 32

約数和(自身を含む): 27033600

約数和(自身を除く): 5656279

約数列:

[1, 7, 29, 31, 43, 79, 203, 217, 301, 553, 899, 1247, 1333, 2291, 2449, 3397, 6293, 8729, 9331, 16037, 17143, 23779, 38657, 71021, 98513, 105307, 270599, 497147, 689591, 737149, 3053903, 21377321]

約数ペア:

[(1, 21377321), (7, 3053903), (29, 737149), (31, 689591), (43, 497147), (79, 270599), (203, 105307), (217, 98513), (301, 71021), (553, 38657), (899, 23779), (1247, 17143), (1333, 16037), (2291, 9331), (2449, 8729), (3397, 6293)]