21907886

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1$

素因数の和:417

約数の個数: 64

約数和(自身を含む): 45674496

約数和(自身を除く): 23766610

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 31, 62, 77, 91, 143, 154, 182, 217, 286, 341, 353, 403, 434, 682, 706, 806, 1001, 2002, 2387, 2471, 2821, 3883, 4433, 4589, 4774, 4942, 5642, 7766, 8866, 9178, 10943, 21886, 27181, 31031, 32123, 50479, 54362, 62062, 64246, 76601, 100958, 120373, 142259, 153202, 240746, 284518, 353353, 706706, 842611, 995813, 1564849, 1685222, 1991626, 3129698, 10953943, 21907886]

約数ペア:

[(1, 21907886), (2, 10953943), (7, 3129698), (11, 1991626), (13, 1685222), (14, 1564849), (22, 995813), (26, 842611), (31, 706706), (62, 353353), (77, 284518), (91, 240746), (143, 153202), (154, 142259), (182, 120373), (217, 100958), (286, 76601), (341, 64246), (353, 62062), (403, 54362), (434, 50479), (682, 32123), (706, 31031), (806, 27181), (1001, 21886), (2002, 10943), (2387, 9178), (2471, 8866), (2821, 7766), (3883, 5642), (4433, 4942), (4589, 4774)]