31249280

素因数分解:

$2^7\times 5^1\times {\mathrm{157}}^1\times {\mathrm{311}}^1$

素因数の和:487

約数の個数: 64

約数和(自身を含む): 75422880

約数和(自身を除く): 44173600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 157, 160, 311, 314, 320, 622, 628, 640, 785, 1244, 1256, 1555, 1570, 2488, 2512, 3110, 3140, 4976, 5024, 6220, 6280, 9952, 10048, 12440, 12560, 19904, 20096, 24880, 25120, 39808, 48827, 49760, 50240, 97654, 99520, 100480, 195308, 199040, 244135, 390616, 488270, 781232, 976540, 1562464, 1953080, 3124928, 3906160, 6249856, 7812320, 15624640, 31249280]

約数ペア:

[(1, 31249280), (2, 15624640), (4, 7812320), (5, 6249856), (8, 3906160), (10, 3124928), (16, 1953080), (20, 1562464), (32, 976540), (40, 781232), (64, 488270), (80, 390616), (128, 244135), (157, 199040), (160, 195308), (311, 100480), (314, 99520), (320, 97654), (622, 50240), (628, 49760), (640, 48827), (785, 39808), (1244, 25120), (1256, 24880), (1555, 20096), (1570, 19904), (2488, 12560), (2512, 12440), (3110, 10048), (3140, 9952), (4976, 6280), (5024, 6220)]