2780005

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:308

約数の個数: 16

約数和(自身を含む): 3483648

約数和(自身を除く): 703643

約数列:

[1, 5, 41, 71, 191, 205, 355, 955, 2911, 7831, 13561, 14555, 39155, 67805, 556001, 2780005]

約数ペア:

[(1, 2780005), (5, 556001), (41, 67805), (71, 39155), (191, 14555), (205, 13561), (355, 7831), (955, 2911)]