20615440

素因数分解:

$2^4\times 5^1\times {\mathrm{439}}^1\times {\mathrm{587}}^1$

素因数の和:1039

約数の個数: 40

約数和(自身を含む): 48121920

約数和(自身を除く): 27506480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 439, 587, 878, 1174, 1756, 2195, 2348, 2935, 3512, 4390, 4696, 5870, 7024, 8780, 9392, 11740, 17560, 23480, 35120, 46960, 257693, 515386, 1030772, 1288465, 2061544, 2576930, 4123088, 5153860, 10307720, 20615440]

約数ペア:

[(1, 20615440), (2, 10307720), (4, 5153860), (5, 4123088), (8, 2576930), (10, 2061544), (16, 1288465), (20, 1030772), (40, 515386), (80, 257693), (439, 46960), (587, 35120), (878, 23480), (1174, 17560), (1756, 11740), (2195, 9392), (2348, 8780), (2935, 7024), (3512, 5870), (4390, 4696)]