20644480

素因数分解:

$2^7\times 5^1\times {\mathrm{32257}}^1$

素因数の和:32276

約数の個数: 32

約数和(自身を含む): 49354740

約数和(自身を除く): 28710260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32257, 64514, 129028, 161285, 258056, 322570, 516112, 645140, 1032224, 1290280, 2064448, 2580560, 4128896, 5161120, 10322240, 20644480]

約数ペア:

[(1, 20644480), (2, 10322240), (4, 5161120), (5, 4128896), (8, 2580560), (10, 2064448), (16, 1290280), (20, 1032224), (32, 645140), (40, 516112), (64, 322570), (80, 258056), (128, 161285), (160, 129028), (320, 64514), (640, 32257)]