20765440

素因数分解:

$2^8\times 5^1\times {\mathrm{16223}}^1$

素因数の和:16244

約数の個数: 36

約数和(自身を含む): 49742784

約数和(自身を除く): 28977344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16223, 32446, 64892, 81115, 129784, 162230, 259568, 324460, 519136, 648920, 1038272, 1297840, 2076544, 2595680, 4153088, 5191360, 10382720, 20765440]

約数ペア:

[(1, 20765440), (2, 10382720), (4, 5191360), (5, 4153088), (8, 2595680), (10, 2076544), (16, 1297840), (20, 1038272), (32, 648920), (40, 519136), (64, 324460), (80, 259568), (128, 162230), (160, 129784), (256, 81115), (320, 64892), (640, 32446), (1280, 16223)]