277480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{991}}^1$

素因数の和:1009

約数の個数: 32

約数和(自身を含む): 714240

約数和(自身を除く): 436760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 991, 1982, 3964, 4955, 6937, 7928, 9910, 13874, 19820, 27748, 34685, 39640, 55496, 69370, 138740, 277480]

約数ペア:

[(1, 277480), (2, 138740), (4, 69370), (5, 55496), (7, 39640), (8, 34685), (10, 27748), (14, 19820), (20, 13874), (28, 9910), (35, 7928), (40, 6937), (56, 4955), (70, 3964), (140, 1982), (280, 991)]