21092680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1061}}^1$

素因数の和:1150

約数の個数: 64

約数和(自身を含む): 55054080

約数和(自身を除く): 33961400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1061, 1420, 1988, 2122, 2485, 2840, 3976, 4244, 4970, 5305, 7427, 8488, 9940, 10610, 14854, 19880, 21220, 29708, 37135, 42440, 59416, 74270, 75331, 148540, 150662, 297080, 301324, 376655, 527317, 602648, 753310, 1054634, 1506620, 2109268, 2636585, 3013240, 4218536, 5273170, 10546340, 21092680]

約数ペア:

[(1, 21092680), (2, 10546340), (4, 5273170), (5, 4218536), (7, 3013240), (8, 2636585), (10, 2109268), (14, 1506620), (20, 1054634), (28, 753310), (35, 602648), (40, 527317), (56, 376655), (70, 301324), (71, 297080), (140, 150662), (142, 148540), (280, 75331), (284, 74270), (355, 59416), (497, 42440), (568, 37135), (710, 29708), (994, 21220), (1061, 19880), (1420, 14854), (1988, 10610), (2122, 9940), (2485, 8488), (2840, 7427), (3976, 5305), (4244, 4970)]