81152920

素因数分解:

$2^3\times 5^1\times {\mathrm{547}}^1\times {\mathrm{3709}}^1$

素因数の和:4267

約数の個数: 32

約数和(自身を含む): 182977200

約数和(自身を除く): 101824280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547, 1094, 2188, 2735, 3709, 4376, 5470, 7418, 10940, 14836, 18545, 21880, 29672, 37090, 74180, 148360, 2028823, 4057646, 8115292, 10144115, 16230584, 20288230, 40576460, 81152920]

約数ペア:

[(1, 81152920), (2, 40576460), (4, 20288230), (5, 16230584), (8, 10144115), (10, 8115292), (20, 4057646), (40, 2028823), (547, 148360), (1094, 74180), (2188, 37090), (2735, 29672), (3709, 21880), (4376, 18545), (5470, 14836), (7418, 10940)]