18987897

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 27934720

約数和(自身を除く): 8946823

約数列:

[1, 3, 19, 43, 57, 61, 127, 129, 183, 381, 817, 1159, 2413, 2451, 2623, 3477, 5461, 7239, 7747, 7869, 16383, 23241, 49837, 103759, 147193, 149511, 311277, 333121, 441579, 999363, 6329299, 18987897]

約数ペア:

[(1, 18987897), (3, 6329299), (19, 999363), (43, 441579), (57, 333121), (61, 311277), (127, 149511), (129, 147193), (183, 103759), (381, 49837), (817, 23241), (1159, 16383), (2413, 7869), (2451, 7747), (2623, 7239), (3477, 5461)]