21043813

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{463}}^1$

素因数の和:664

約数の個数: 16

約数和(自身を含む): 24825856

約数和(自身を除く): 3782043

約数列:

[1, 7, 43, 151, 301, 463, 1057, 3241, 6493, 19909, 45451, 69913, 139363, 489391, 3006259, 21043813]

約数ペア:

[(1, 21043813), (7, 3006259), (43, 489391), (151, 139363), (301, 69913), (463, 45451), (1057, 19909), (3241, 6493)]