128844580

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{16561}}^1$

素因数の和:16959

約数の個数: 24

約数和(自身を含む): 271285560

約数和(自身を除く): 142440980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 16561, 33122, 66244, 82805, 165610, 331220, 6442229, 12884458, 25768916, 32211145, 64422290, 128844580]

約数ペア:

[(1, 128844580), (2, 64422290), (4, 32211145), (5, 25768916), (10, 12884458), (20, 6442229), (389, 331220), (778, 165610), (1556, 82805), (1945, 66244), (3890, 33122), (7780, 16561)]