64640140

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{12289}}^1$

素因数の和:12561

約数の個数: 24

約数和(自身を含む): 136271520

約数和(自身を除く): 71631380

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 5260, 12289, 24578, 49156, 61445, 122890, 245780, 3232007, 6464014, 12928028, 16160035, 32320070, 64640140]

約数ペア:

[(1, 64640140), (2, 32320070), (4, 16160035), (5, 12928028), (10, 6464014), (20, 3232007), (263, 245780), (526, 122890), (1052, 61445), (1315, 49156), (2630, 24578), (5260, 12289)]