20281356

素因数分解:

$2^2\times 3^2\times {\mathrm{499}}^1\times {\mathrm{1129}}^1$

素因数の和:1638

約数の個数: 36

約数和(自身を含む): 51415000

約数和(自身を除く): 31133644

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 499, 998, 1129, 1497, 1996, 2258, 2994, 3387, 4491, 4516, 5988, 6774, 8982, 10161, 13548, 17964, 20322, 40644, 563371, 1126742, 1690113, 2253484, 3380226, 5070339, 6760452, 10140678, 20281356]

約数ペア:

[(1, 20281356), (2, 10140678), (3, 6760452), (4, 5070339), (6, 3380226), (9, 2253484), (12, 1690113), (18, 1126742), (36, 563371), (499, 40644), (998, 20322), (1129, 17964), (1497, 13548), (1996, 10161), (2258, 8982), (2994, 6774), (3387, 5988), (4491, 4516)]