19728640

素因数分解:

$2^8\times 5^1\times {\mathrm{15413}}^1$

素因数の和:15434

約数の個数: 36

約数和(自身を含む): 47259324

約数和(自身を除く): 27530684

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15413, 30826, 61652, 77065, 123304, 154130, 246608, 308260, 493216, 616520, 986432, 1233040, 1972864, 2466080, 3945728, 4932160, 9864320, 19728640]

約数ペア:

[(1, 19728640), (2, 9864320), (4, 4932160), (5, 3945728), (8, 2466080), (10, 1972864), (16, 1233040), (20, 986432), (32, 616520), (40, 493216), (64, 308260), (80, 246608), (128, 154130), (160, 123304), (256, 77065), (320, 61652), (640, 30826), (1280, 15413)]