19618991

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1\times {\mathrm{359}}^1$

素因数の和:614

約数の個数: 16

約数和(自身を含む): 23201280

約数和(自身を除く): 3582289

約数列:

[1, 7, 37, 211, 259, 359, 1477, 2513, 7807, 13283, 54649, 75749, 92981, 530243, 2802713, 19618991]

約数ペア:

[(1, 19618991), (7, 2802713), (37, 530243), (211, 92981), (259, 75749), (359, 54649), (1477, 13283), (2513, 7807)]