78864640

素因数分解:

$2^8\times 5^1\times {\mathrm{61613}}^1$

素因数の和:61634

約数の個数: 36

約数和(自身を含む): 188908524

約数和(自身を除く): 110043884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 61613, 123226, 246452, 308065, 492904, 616130, 985808, 1232260, 1971616, 2464520, 3943232, 4929040, 7886464, 9858080, 15772928, 19716160, 39432320, 78864640]

約数ペア:

[(1, 78864640), (2, 39432320), (4, 19716160), (5, 15772928), (8, 9858080), (10, 7886464), (16, 4929040), (20, 3943232), (32, 2464520), (40, 1971616), (64, 1232260), (80, 985808), (128, 616130), (160, 492904), (256, 308065), (320, 246452), (640, 123226), (1280, 61613)]