20390860

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20807}}^1$

素因数の和:20830

約数の個数: 36

約数和(自身を含む): 49814352

約数和(自身を除く): 29423492

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20807, 41614, 83228, 104035, 145649, 208070, 291298, 416140, 582596, 728245, 1019543, 1456490, 2039086, 2912980, 4078172, 5097715, 10195430, 20390860]

約数ペア:

[(1, 20390860), (2, 10195430), (4, 5097715), (5, 4078172), (7, 2912980), (10, 2039086), (14, 1456490), (20, 1019543), (28, 728245), (35, 582596), (49, 416140), (70, 291298), (98, 208070), (140, 145649), (196, 104035), (245, 83228), (490, 41614), (980, 20807)]