18643807

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 24837120

約数和(自身を除く): 6193313

約数列:

[1, 7, 13, 19, 41, 91, 133, 247, 263, 287, 533, 779, 1729, 1841, 3419, 3731, 4997, 5453, 10127, 10783, 23933, 34979, 64961, 70889, 75481, 140179, 204877, 454727, 981253, 1434139, 2663401, 18643807]

約数ペア:

[(1, 18643807), (7, 2663401), (13, 1434139), (19, 981253), (41, 454727), (91, 204877), (133, 140179), (247, 75481), (263, 70889), (287, 64961), (533, 34979), (779, 23933), (1729, 10783), (1841, 10127), (3419, 5453), (3731, 4997)]