21893060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{443}}^1$

素因数の和:812

約数の個数: 48

約数和(自身を含む): 52811136

約数和(自身を除く): 30918076

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 353, 443, 706, 886, 1412, 1765, 1772, 2215, 2471, 3101, 3530, 4430, 4942, 6202, 7060, 8860, 9884, 12355, 12404, 15505, 24710, 31010, 49420, 62020, 156379, 312758, 625516, 781895, 1094653, 1563790, 2189306, 3127580, 4378612, 5473265, 10946530, 21893060]

約数ペア:

[(1, 21893060), (2, 10946530), (4, 5473265), (5, 4378612), (7, 3127580), (10, 2189306), (14, 1563790), (20, 1094653), (28, 781895), (35, 625516), (70, 312758), (140, 156379), (353, 62020), (443, 49420), (706, 31010), (886, 24710), (1412, 15505), (1765, 12404), (1772, 12355), (2215, 9884), (2471, 8860), (3101, 7060), (3530, 6202), (4430, 4942)]