21325780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{463}}^1$

素因数の和:533

約数の個数: 72

約数和(自身を含む): 53319168

約数和(自身を除く): 31993388

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 49, 70, 94, 98, 140, 188, 196, 235, 245, 329, 463, 470, 490, 658, 926, 940, 980, 1316, 1645, 1852, 2303, 2315, 3241, 3290, 4606, 4630, 6482, 6580, 9212, 9260, 11515, 12964, 16205, 21761, 22687, 23030, 32410, 43522, 45374, 46060, 64820, 87044, 90748, 108805, 113435, 152327, 217610, 226870, 304654, 435220, 453740, 609308, 761635, 1066289, 1523270, 2132578, 3046540, 4265156, 5331445, 10662890, 21325780]

約数ペア:

[(1, 21325780), (2, 10662890), (4, 5331445), (5, 4265156), (7, 3046540), (10, 2132578), (14, 1523270), (20, 1066289), (28, 761635), (35, 609308), (47, 453740), (49, 435220), (70, 304654), (94, 226870), (98, 217610), (140, 152327), (188, 113435), (196, 108805), (235, 90748), (245, 87044), (329, 64820), (463, 46060), (470, 45374), (490, 43522), (658, 32410), (926, 23030), (940, 22687), (980, 21761), (1316, 16205), (1645, 12964), (1852, 11515), (2303, 9260), (2315, 9212), (3241, 6580), (3290, 6482), (4606, 4630)]