18801965

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1$

素因数の和:130

約数の個数: 48

約数和(自身を含む): 29361024

約数和(自身を除く): 10559059

約数列:

[1, 5, 7, 13, 31, 35, 43, 65, 91, 155, 215, 217, 301, 403, 455, 559, 961, 1085, 1333, 1505, 2015, 2795, 2821, 3913, 4805, 6665, 6727, 9331, 12493, 14105, 17329, 19565, 33635, 41323, 46655, 62465, 86645, 87451, 121303, 206615, 289261, 437255, 537199, 606515, 1446305, 2685995, 3760393, 18801965]

約数ペア:

[(1, 18801965), (5, 3760393), (7, 2685995), (13, 1446305), (31, 606515), (35, 537199), (43, 437255), (65, 289261), (91, 206615), (155, 121303), (215, 87451), (217, 86645), (301, 62465), (403, 46655), (455, 41323), (559, 33635), (961, 19565), (1085, 17329), (1333, 14105), (1505, 12493), (2015, 9331), (2795, 6727), (2821, 6665), (3913, 4805)]