21437871

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4133}}^1$

素因数の和:4175

約数の個数: 32

約数和(自身を含む): 37040640

約数和(自身を除く): 15602769

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 247, 273, 399, 741, 1729, 4133, 5187, 12399, 28931, 53729, 78527, 86793, 161187, 235581, 376103, 549689, 1020851, 1128309, 1649067, 3062553, 7145957, 21437871]

約数ペア:

[(1, 21437871), (3, 7145957), (7, 3062553), (13, 1649067), (19, 1128309), (21, 1020851), (39, 549689), (57, 376103), (91, 235581), (133, 161187), (247, 86793), (273, 78527), (399, 53729), (741, 28931), (1729, 12399), (4133, 5187)]