21188720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{241}}^1$

素因数の和:418

約数の個数: 80

約数和(自身を含む): 56895168

約数和(自身を除く): 35706448

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 157, 241, 280, 314, 482, 560, 628, 785, 964, 1099, 1205, 1256, 1570, 1687, 1928, 2198, 2410, 2512, 3140, 3374, 3856, 4396, 4820, 5495, 6280, 6748, 8435, 8792, 9640, 10990, 12560, 13496, 16870, 17584, 19280, 21980, 26992, 33740, 37837, 43960, 67480, 75674, 87920, 134960, 151348, 189185, 264859, 302696, 378370, 529718, 605392, 756740, 1059436, 1324295, 1513480, 2118872, 2648590, 3026960, 4237744, 5297180, 10594360, 21188720]

約数ペア:

[(1, 21188720), (2, 10594360), (4, 5297180), (5, 4237744), (7, 3026960), (8, 2648590), (10, 2118872), (14, 1513480), (16, 1324295), (20, 1059436), (28, 756740), (35, 605392), (40, 529718), (56, 378370), (70, 302696), (80, 264859), (112, 189185), (140, 151348), (157, 134960), (241, 87920), (280, 75674), (314, 67480), (482, 43960), (560, 37837), (628, 33740), (785, 26992), (964, 21980), (1099, 19280), (1205, 17584), (1256, 16870), (1570, 13496), (1687, 12560), (1928, 10990), (2198, 9640), (2410, 8792), (2512, 8435), (3140, 6748), (3374, 6280), (3856, 5495), (4396, 4820)]