18781239

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 27143424

約数和(自身を除く): 8362185

約数列:

[1, 3, 41, 43, 53, 67, 123, 129, 159, 201, 1763, 2173, 2279, 2747, 2881, 3551, 5289, 6519, 6837, 8241, 8643, 10653, 93439, 118121, 145591, 152693, 280317, 354363, 436773, 458079, 6260413, 18781239]

約数ペア:

[(1, 18781239), (3, 6260413), (41, 458079), (43, 436773), (53, 354363), (67, 280317), (123, 152693), (129, 145591), (159, 118121), (201, 93439), (1763, 10653), (2173, 8643), (2279, 8241), (2747, 6837), (2881, 6519), (3551, 5289)]