20665960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{3209}}^1$

素因数の和:3250

約数の個数: 64

約数和(自身を含む): 55468800

約数和(自身を除く): 34802840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3209, 3220, 6418, 6440, 12836, 16045, 22463, 25672, 32090, 44926, 64180, 73807, 89852, 112315, 128360, 147614, 179704, 224630, 295228, 369035, 449260, 516649, 590456, 738070, 898520, 1033298, 1476140, 2066596, 2583245, 2952280, 4133192, 5166490, 10332980, 20665960]

約数ペア:

[(1, 20665960), (2, 10332980), (4, 5166490), (5, 4133192), (7, 2952280), (8, 2583245), (10, 2066596), (14, 1476140), (20, 1033298), (23, 898520), (28, 738070), (35, 590456), (40, 516649), (46, 449260), (56, 369035), (70, 295228), (92, 224630), (115, 179704), (140, 147614), (161, 128360), (184, 112315), (230, 89852), (280, 73807), (322, 64180), (460, 44926), (644, 32090), (805, 25672), (920, 22463), (1288, 16045), (1610, 12836), (3209, 6440), (3220, 6418)]