20706945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{991}}^1$

素因数の和:1205

約数の個数: 32

約数和(自身を含む): 38092800

約数和(自身を除く): 17385855

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 199, 597, 991, 995, 1393, 2973, 2985, 4179, 4955, 6937, 6965, 14865, 20811, 20895, 34685, 104055, 197209, 591627, 986045, 1380463, 2958135, 4141389, 6902315, 20706945]

約数ペア:

[(1, 20706945), (3, 6902315), (5, 4141389), (7, 2958135), (15, 1380463), (21, 986045), (35, 591627), (105, 197209), (199, 104055), (597, 34685), (991, 20895), (995, 20811), (1393, 14865), (2973, 6965), (2985, 6937), (4179, 4955)]