20688395

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1109}}^1$

素因数の和:1175

約数の個数: 32

約数和(自身を含む): 31328640

約数和(自身を除く): 10640245

約数列:

[1, 5, 7, 13, 35, 41, 65, 91, 205, 287, 455, 533, 1109, 1435, 2665, 3731, 5545, 7763, 14417, 18655, 38815, 45469, 72085, 100919, 227345, 318283, 504595, 591097, 1591415, 2955485, 4137679, 20688395]

約数ペア:

[(1, 20688395), (5, 4137679), (7, 2955485), (13, 1591415), (35, 591097), (41, 504595), (65, 318283), (91, 227345), (205, 100919), (287, 72085), (455, 45469), (533, 38815), (1109, 18655), (1435, 14417), (2665, 7763), (3731, 5545)]