81568400

素因数分解:

$2^4\times 5^2\times {\mathrm{203921}}^1$

素因数の和:203939

約数の個数: 30

約数和(自身を含む): 195969042

約数和(自身を除く): 114400642

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 203921, 407842, 815684, 1019605, 1631368, 2039210, 3262736, 4078420, 5098025, 8156840, 10196050, 16313680, 20392100, 40784200, 81568400]

約数ペア:

[(1, 81568400), (2, 40784200), (4, 20392100), (5, 16313680), (8, 10196050), (10, 8156840), (16, 5098025), (20, 4078420), (25, 3262736), (40, 2039210), (50, 1631368), (80, 1019605), (100, 815684), (200, 407842), (400, 203921)]