12919221

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 23063040

約数和(自身を除く): 10143819

約数列:

[1, 3, 7, 9, 19, 21, 43, 57, 63, 129, 133, 171, 251, 301, 387, 399, 753, 817, 903, 1197, 1757, 2259, 2451, 2709, 4769, 5271, 5719, 7353, 10793, 14307, 15813, 17157, 32379, 33383, 42921, 51471, 75551, 97137, 100149, 205067, 226653, 300447, 615201, 679959, 1435469, 1845603, 4306407, 12919221]

約数ペア:

[(1, 12919221), (3, 4306407), (7, 1845603), (9, 1435469), (19, 679959), (21, 615201), (43, 300447), (57, 226653), (63, 205067), (129, 100149), (133, 97137), (171, 75551), (251, 51471), (301, 42921), (387, 33383), (399, 32379), (753, 17157), (817, 15813), (903, 14307), (1197, 10793), (1757, 7353), (2259, 5719), (2451, 5271), (2709, 4769)]