20930980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3181}}^1$

素因数の和:3244

約数の個数: 48

約数和(自身を含む): 51319296

約数和(自身を除く): 30388316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3181, 3290, 6362, 6580, 12724, 15905, 22267, 31810, 44534, 63620, 89068, 111335, 149507, 222670, 299014, 445340, 598028, 747535, 1046549, 1495070, 2093098, 2990140, 4186196, 5232745, 10465490, 20930980]

約数ペア:

[(1, 20930980), (2, 10465490), (4, 5232745), (5, 4186196), (7, 2990140), (10, 2093098), (14, 1495070), (20, 1046549), (28, 747535), (35, 598028), (47, 445340), (70, 299014), (94, 222670), (140, 149507), (188, 111335), (235, 89068), (329, 63620), (470, 44534), (658, 31810), (940, 22267), (1316, 15905), (1645, 12724), (3181, 6580), (3290, 6362)]