12820120

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4057}}^1$

素因数の和:4147

約数の個数: 32

約数和(自身を含む): 29217600

約数和(自身を除く): 16397480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 4057, 8114, 16228, 20285, 32456, 40570, 81140, 162280, 320503, 641006, 1282012, 1602515, 2564024, 3205030, 6410060, 12820120]

約数ペア:

[(1, 12820120), (2, 6410060), (4, 3205030), (5, 2564024), (8, 1602515), (10, 1282012), (20, 641006), (40, 320503), (79, 162280), (158, 81140), (316, 40570), (395, 32456), (632, 20285), (790, 16228), (1580, 8114), (3160, 4057)]