20841405

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6287}}^1$

素因数の和:6325

約数の個数: 32

約数和(自身を含む): 38029824

約数和(自身を除く): 17188419

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6287, 18861, 31435, 81731, 94305, 106879, 245193, 320637, 408655, 534395, 1225965, 1389427, 1603185, 4168281, 6947135, 20841405]

約数ペア:

[(1, 20841405), (3, 6947135), (5, 4168281), (13, 1603185), (15, 1389427), (17, 1225965), (39, 534395), (51, 408655), (65, 320637), (85, 245193), (195, 106879), (221, 94305), (255, 81731), (663, 31435), (1105, 18861), (3315, 6287)]