19970587

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{293}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 25338096

約数和(自身を除く): 5367509

約数列:

[1, 7, 13, 49, 91, 107, 293, 637, 749, 1391, 2051, 3809, 5243, 9737, 14357, 26663, 31351, 68159, 186641, 219457, 407563, 1536199, 2852941, 19970587]

約数ペア:

[(1, 19970587), (7, 2852941), (13, 1536199), (49, 407563), (91, 219457), (107, 186641), (293, 68159), (637, 31351), (749, 26663), (1391, 14357), (2051, 9737), (3809, 5243)]