81303320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290369}}^1$

素因数の和:290387

約数の個数: 32

約数和(自身を含む): 209066400

約数和(自身を除く): 127763080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290369, 580738, 1161476, 1451845, 2032583, 2322952, 2903690, 4065166, 5807380, 8130332, 10162915, 11614760, 16260664, 20325830, 40651660, 81303320]

約数ペア:

[(1, 81303320), (2, 40651660), (4, 20325830), (5, 16260664), (7, 11614760), (8, 10162915), (10, 8130332), (14, 5807380), (20, 4065166), (28, 2903690), (35, 2322952), (40, 2032583), (56, 1451845), (70, 1161476), (140, 580738), (280, 290369)]