20685440

素因数分解:

$2^7\times 5^1\times {\mathrm{32321}}^1$

素因数の和:32340

約数の個数: 32

約数和(自身を含む): 49452660

約数和(自身を除く): 28767220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32321, 64642, 129284, 161605, 258568, 323210, 517136, 646420, 1034272, 1292840, 2068544, 2585680, 4137088, 5171360, 10342720, 20685440]

約数ペア:

[(1, 20685440), (2, 10342720), (4, 5171360), (5, 4137088), (8, 2585680), (10, 2068544), (16, 1292840), (20, 1034272), (32, 646420), (40, 517136), (64, 323210), (80, 258568), (128, 161605), (160, 129284), (320, 64642), (640, 32321)]