20985978

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{6257}}^1$

素因数の和:6318

約数の個数: 32

約数和(自身を含む): 46259136

約数和(自身を除く): 25273158

約数列:

[1, 2, 3, 6, 13, 26, 39, 43, 78, 86, 129, 258, 559, 1118, 1677, 3354, 6257, 12514, 18771, 37542, 81341, 162682, 244023, 269051, 488046, 538102, 807153, 1614306, 3497663, 6995326, 10492989, 20985978]

約数ペア:

[(1, 20985978), (2, 10492989), (3, 6995326), (6, 3497663), (13, 1614306), (26, 807153), (39, 538102), (43, 488046), (78, 269051), (86, 244023), (129, 162682), (258, 81341), (559, 37542), (1118, 18771), (1677, 12514), (3354, 6257)]