20177680

素因数分解:

$2^4\times 5^1\times {\mathrm{311}}^1\times {\mathrm{811}}^1$

素因数の和:1135

約数の個数: 40

約数和(自身を含む): 47121984

約数和(自身を除く): 26944304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 311, 622, 811, 1244, 1555, 1622, 2488, 3110, 3244, 4055, 4976, 6220, 6488, 8110, 12440, 12976, 16220, 24880, 32440, 64880, 252221, 504442, 1008884, 1261105, 2017768, 2522210, 4035536, 5044420, 10088840, 20177680]

約数ペア:

[(1, 20177680), (2, 10088840), (4, 5044420), (5, 4035536), (8, 2522210), (10, 2017768), (16, 1261105), (20, 1008884), (40, 504442), (80, 252221), (311, 64880), (622, 32440), (811, 24880), (1244, 16220), (1555, 12976), (1622, 12440), (2488, 8110), (3110, 6488), (3244, 6220), (4055, 4976)]