81207040

素因数分解:

$2^8\times 5^1\times {\mathrm{63443}}^1$

素因数の和:63464

約数の個数: 36

約数和(自身を含む): 194519304

約数和(自身を除く): 113312264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 63443, 126886, 253772, 317215, 507544, 634430, 1015088, 1268860, 2030176, 2537720, 4060352, 5075440, 8120704, 10150880, 16241408, 20301760, 40603520, 81207040]

約数ペア:

[(1, 81207040), (2, 40603520), (4, 20301760), (5, 16241408), (8, 10150880), (10, 8120704), (16, 5075440), (20, 4060352), (32, 2537720), (40, 2030176), (64, 1268860), (80, 1015088), (128, 634430), (160, 507544), (256, 317215), (320, 253772), (640, 126886), (1280, 63443)]