19796980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20201}}^1$

素因数の和:20224

約数の個数: 36

約数和(自身を含む): 48363588

約数和(自身を除く): 28566608

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20201, 40402, 80804, 101005, 141407, 202010, 282814, 404020, 565628, 707035, 989849, 1414070, 1979698, 2828140, 3959396, 4949245, 9898490, 19796980]

約数ペア:

[(1, 19796980), (2, 9898490), (4, 4949245), (5, 3959396), (7, 2828140), (10, 1979698), (14, 1414070), (20, 989849), (28, 707035), (35, 565628), (49, 404020), (70, 282814), (98, 202010), (140, 141407), (196, 101005), (245, 80804), (490, 40402), (980, 20201)]