19800490

素因数分解:

$2^1\times 5^1\times {\mathrm{641}}^1\times {\mathrm{3089}}^1$

素因数の和:3737

約数の個数: 16

約数和(自身を含む): 35708040

約数和(自身を除く): 15907550

約数列:

[1, 2, 5, 10, 641, 1282, 3089, 3205, 6178, 6410, 15445, 30890, 1980049, 3960098, 9900245, 19800490]

約数ペア:

[(1, 19800490), (2, 9900245), (5, 3960098), (10, 1980049), (641, 30890), (1282, 15445), (3089, 6410), (3205, 6178)]