31871980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{907}}^1$

素因数の和:1174

約数の個数: 48

約数和(自身を含む): 76882176

約数和(自身を除く): 45010196

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 907, 1004, 1255, 1757, 1814, 2510, 3514, 3628, 4535, 5020, 6349, 7028, 8785, 9070, 12698, 17570, 18140, 25396, 31745, 35140, 63490, 126980, 227657, 455314, 910628, 1138285, 1593599, 2276570, 3187198, 4553140, 6374396, 7967995, 15935990, 31871980]

約数ペア:

[(1, 31871980), (2, 15935990), (4, 7967995), (5, 6374396), (7, 4553140), (10, 3187198), (14, 2276570), (20, 1593599), (28, 1138285), (35, 910628), (70, 455314), (140, 227657), (251, 126980), (502, 63490), (907, 35140), (1004, 31745), (1255, 25396), (1757, 18140), (1814, 17570), (2510, 12698), (3514, 9070), (3628, 8785), (4535, 7028), (5020, 6349)]