20786787

素因数分解:

$3^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{601}}^1$

素因数の和:681

約数の個数: 40

約数和(自身を含む): 36129632

約数和(自身を除く): 15342845

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 81, 183, 189, 427, 549, 567, 601, 1281, 1647, 1803, 3843, 4207, 4941, 5409, 11529, 12621, 16227, 34587, 36661, 37863, 48681, 109983, 113589, 256627, 329949, 340767, 769881, 989847, 2309643, 2969541, 6928929, 20786787]

約数ペア:

[(1, 20786787), (3, 6928929), (7, 2969541), (9, 2309643), (21, 989847), (27, 769881), (61, 340767), (63, 329949), (81, 256627), (183, 113589), (189, 109983), (427, 48681), (549, 37863), (567, 36661), (601, 34587), (1281, 16227), (1647, 12621), (1803, 11529), (3843, 5409), (4207, 4941)]