21048009

素因数分解:

$3^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1\times {\mathrm{337}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 28554240

約数和(自身を除く): 7506231

約数列:

[1, 3, 109, 191, 327, 337, 573, 1011, 20819, 36733, 62457, 64367, 110199, 193101, 7016003, 21048009]

約数ペア:

[(1, 21048009), (3, 7016003), (109, 193101), (191, 110199), (327, 64367), (337, 62457), (573, 36733), (1011, 20819)]