28721980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{205157}}^1$

素因数の和:205173

約数の個数: 24

約数和(自身を含む): 68933088

約数和(自身を除く): 40211108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 205157, 410314, 820628, 1025785, 1436099, 2051570, 2872198, 4103140, 5744396, 7180495, 14360990, 28721980]

約数ペア:

[(1, 28721980), (2, 14360990), (4, 7180495), (5, 5744396), (7, 4103140), (10, 2872198), (14, 2051570), (20, 1436099), (28, 1025785), (35, 820628), (70, 410314), (140, 205157)]