199984780

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{283}}^1\times {\mathrm{397}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 427260960

約数和(自身を除く): 227276180

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 283, 356, 397, 445, 566, 794, 890, 1132, 1415, 1588, 1780, 1985, 2830, 3970, 5660, 7940, 25187, 35333, 50374, 70666, 100748, 112351, 125935, 141332, 176665, 224702, 251870, 353330, 449404, 503740, 561755, 706660, 1123510, 2247020, 9999239, 19998478, 39996956, 49996195, 99992390, 199984780]

約数ペア:

[(1, 199984780), (2, 99992390), (4, 49996195), (5, 39996956), (10, 19998478), (20, 9999239), (89, 2247020), (178, 1123510), (283, 706660), (356, 561755), (397, 503740), (445, 449404), (566, 353330), (794, 251870), (890, 224702), (1132, 176665), (1415, 141332), (1588, 125935), (1780, 112351), (1985, 100748), (2830, 70666), (3970, 50374), (5660, 35333), (7940, 25187)]