7998860

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 17563392

約数和(自身を除く): 9564532

約数列:

[1, 2, 4, 5, 10, 20, 43, 71, 86, 131, 142, 172, 215, 262, 284, 355, 430, 524, 655, 710, 860, 1310, 1420, 2620, 3053, 5633, 6106, 9301, 11266, 12212, 15265, 18602, 22532, 28165, 30530, 37204, 46505, 56330, 61060, 93010, 112660, 186020, 399943, 799886, 1599772, 1999715, 3999430, 7998860]

約数ペア:

[(1, 7998860), (2, 3999430), (4, 1999715), (5, 1599772), (10, 799886), (20, 399943), (43, 186020), (71, 112660), (86, 93010), (131, 61060), (142, 56330), (172, 46505), (215, 37204), (262, 30530), (284, 28165), (355, 22532), (430, 18602), (524, 15265), (655, 12212), (710, 11266), (860, 9301), (1310, 6106), (1420, 5633), (2620, 3053)]