19881235

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{7691}}^1$

素因数の和:7754

約数の個数: 16

約数和(自身を含む): 26583552

約数和(自身を除く): 6702317

約数列:

[1, 5, 11, 47, 55, 235, 517, 2585, 7691, 38455, 84601, 361477, 423005, 1807385, 3976247, 19881235]

約数ペア:

[(1, 19881235), (5, 3976247), (11, 1807385), (47, 423005), (55, 361477), (235, 84601), (517, 38455), (2585, 7691)]