81638720

素因数分解:

$2^6\times 5^1\times {\mathrm{255121}}^1$

素因数の和:255138

約数の個数: 28

約数和(自身を含む): 194402964

約数和(自身を除く): 112764244

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 255121, 510242, 1020484, 1275605, 2040968, 2551210, 4081936, 5102420, 8163872, 10204840, 16327744, 20409680, 40819360, 81638720]

約数ペア:

[(1, 81638720), (2, 40819360), (4, 20409680), (5, 16327744), (8, 10204840), (10, 8163872), (16, 5102420), (20, 4081936), (32, 2551210), (40, 2040968), (64, 1275605), (80, 1020484), (160, 510242), (320, 255121)]