21673813

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{1523}}^1$

素因数の和:1656

約数の個数: 16

約数和(自身を含む): 26334720

約数和(自身を除く): 4660907

約数列:

[1, 7, 19, 107, 133, 749, 1523, 2033, 10661, 14231, 28937, 162961, 202559, 1140727, 3096259, 21673813]

約数ペア:

[(1, 21673813), (7, 3096259), (19, 1140727), (107, 202559), (133, 162961), (749, 28937), (1523, 14231), (2033, 10661)]