21300440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{599}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 55296000

約数和(自身を除く): 33995560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 599, 635, 889, 1016, 1198, 1270, 1778, 2396, 2540, 2995, 3556, 4193, 4445, 4792, 5080, 5990, 7112, 8386, 8890, 11980, 16772, 17780, 20965, 23960, 33544, 35560, 41930, 76073, 83860, 152146, 167720, 304292, 380365, 532511, 608584, 760730, 1065022, 1521460, 2130044, 2662555, 3042920, 4260088, 5325110, 10650220, 21300440]

約数ペア:

[(1, 21300440), (2, 10650220), (4, 5325110), (5, 4260088), (7, 3042920), (8, 2662555), (10, 2130044), (14, 1521460), (20, 1065022), (28, 760730), (35, 608584), (40, 532511), (56, 380365), (70, 304292), (127, 167720), (140, 152146), (254, 83860), (280, 76073), (508, 41930), (599, 35560), (635, 33544), (889, 23960), (1016, 20965), (1198, 17780), (1270, 16772), (1778, 11980), (2396, 8890), (2540, 8386), (2995, 7112), (3556, 5990), (4193, 5080), (4445, 4792)]