21040688

素因数分解:

$2^4\times {\mathrm{997}}^1\times {\mathrm{1319}}^1$

素因数の和:2324

約数の個数: 20

約数和(自身を含む): 40838160

約数和(自身を除く): 19797472

約数列:

[1, 2, 4, 8, 16, 997, 1319, 1994, 2638, 3988, 5276, 7976, 10552, 15952, 21104, 1315043, 2630086, 5260172, 10520344, 21040688]

約数ペア:

[(1, 21040688), (2, 10520344), (4, 5260172), (8, 2630086), (16, 1315043), (997, 21104), (1319, 15952), (1994, 10552), (2638, 7976), (3988, 5276)]