19998771

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{6491}}^1$

素因数の和:6586

約数の個数: 16

約数和(自身を含む): 29084160

約数和(自身を除く): 9085389

約数列:

[1, 3, 13, 39, 79, 237, 1027, 3081, 6491, 19473, 84383, 253149, 512789, 1538367, 6666257, 19998771]

約数ペア:

[(1, 19998771), (3, 6666257), (13, 1538367), (39, 512789), (79, 253149), (237, 84383), (1027, 19473), (3081, 6491)]