21199810

素因数分解:

$2^1\times 5^1\times {\mathrm{1303}}^1\times {\mathrm{1627}}^1$

素因数の和:2937

約数の個数: 16

約数和(自身を含む): 38212416

約数和(自身を除く): 17012606

約数列:

[1, 2, 5, 10, 1303, 1627, 2606, 3254, 6515, 8135, 13030, 16270, 2119981, 4239962, 10599905, 21199810]

約数ペア:

[(1, 21199810), (2, 10599905), (5, 4239962), (10, 2119981), (1303, 16270), (1627, 13030), (2606, 8135), (3254, 6515)]