81936640

素因数分解:

$2^8\times 5^1\times {\mathrm{64013}}^1$

素因数の和:64034

約数の個数: 36

約数和(自身を含む): 196266924

約数和(自身を除く): 114330284

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 64013, 128026, 256052, 320065, 512104, 640130, 1024208, 1280260, 2048416, 2560520, 4096832, 5121040, 8193664, 10242080, 16387328, 20484160, 40968320, 81936640]

約数ペア:

[(1, 81936640), (2, 40968320), (4, 20484160), (5, 16387328), (8, 10242080), (10, 8193664), (16, 5121040), (20, 4096832), (32, 2560520), (40, 2048416), (64, 1280260), (80, 1024208), (128, 640130), (160, 512104), (256, 320065), (320, 256052), (640, 128026), (1280, 64013)]