21940520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{617}}^1$

素因数の和:762

約数の個数: 64

約数和(自身を含む): 56954880

約数和(自身を除く): 35014360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 617, 635, 889, 1016, 1234, 1270, 1778, 2468, 2540, 3085, 3556, 4319, 4445, 4936, 5080, 6170, 7112, 8638, 8890, 12340, 17276, 17780, 21595, 24680, 34552, 35560, 43190, 78359, 86380, 156718, 172760, 313436, 391795, 548513, 626872, 783590, 1097026, 1567180, 2194052, 2742565, 3134360, 4388104, 5485130, 10970260, 21940520]

約数ペア:

[(1, 21940520), (2, 10970260), (4, 5485130), (5, 4388104), (7, 3134360), (8, 2742565), (10, 2194052), (14, 1567180), (20, 1097026), (28, 783590), (35, 626872), (40, 548513), (56, 391795), (70, 313436), (127, 172760), (140, 156718), (254, 86380), (280, 78359), (508, 43190), (617, 35560), (635, 34552), (889, 24680), (1016, 21595), (1234, 17780), (1270, 17276), (1778, 12340), (2468, 8890), (2540, 8638), (3085, 7112), (3556, 6170), (4319, 5080), (4445, 4936)]