18945813

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:285

約数の個数: 32

約数和(自身を含む): 27885312

約数和(自身を除く): 8939499

約数列:

[1, 3, 23, 37, 41, 69, 111, 123, 181, 543, 851, 943, 1517, 2553, 2829, 4163, 4551, 6697, 7421, 12489, 20091, 22263, 34891, 104673, 154031, 170683, 274577, 462093, 512049, 823731, 6315271, 18945813]

約数ペア:

[(1, 18945813), (3, 6315271), (23, 823731), (37, 512049), (41, 462093), (69, 274577), (111, 170683), (123, 154031), (181, 104673), (543, 34891), (851, 22263), (943, 20091), (1517, 12489), (2553, 7421), (2829, 6697), (4163, 4551)]