213778840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{1249}}^1$

素因数の和:1660

約数の個数: 64

約数和(自身を含む): 526500000

約数和(自身を除く): 312721160

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 389, 440, 778, 1249, 1556, 1945, 2498, 3112, 3890, 4279, 4996, 6245, 7780, 8558, 9992, 12490, 13739, 15560, 17116, 21395, 24980, 27478, 34232, 42790, 49960, 54956, 68695, 85580, 109912, 137390, 171160, 274780, 485861, 549560, 971722, 1943444, 2429305, 3886888, 4858610, 5344471, 9717220, 10688942, 19434440, 21377884, 26722355, 42755768, 53444710, 106889420, 213778840]

約数ペア:

[(1, 213778840), (2, 106889420), (4, 53444710), (5, 42755768), (8, 26722355), (10, 21377884), (11, 19434440), (20, 10688942), (22, 9717220), (40, 5344471), (44, 4858610), (55, 3886888), (88, 2429305), (110, 1943444), (220, 971722), (389, 549560), (440, 485861), (778, 274780), (1249, 171160), (1556, 137390), (1945, 109912), (2498, 85580), (3112, 68695), (3890, 54956), (4279, 49960), (4996, 42790), (6245, 34232), (7780, 27478), (8558, 24980), (9992, 21395), (12490, 17116), (13739, 15560)]