19988738

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19824382

約数列:

[1, 2, 7, 11, 14, 22, 31, 53, 62, 77, 79, 106, 154, 158, 217, 341, 371, 434, 553, 583, 682, 742, 869, 1106, 1166, 1643, 1738, 2387, 2449, 3286, 4081, 4187, 4774, 4898, 6083, 8162, 8374, 11501, 12166, 17143, 18073, 23002, 26939, 29309, 34286, 36146, 46057, 53878, 58618, 92114, 126511, 129797, 188573, 253022, 259594, 322399, 377146, 644798, 908579, 1427767, 1817158, 2855534, 9994369, 19988738]

約数ペア:

[(1, 19988738), (2, 9994369), (7, 2855534), (11, 1817158), (14, 1427767), (22, 908579), (31, 644798), (53, 377146), (62, 322399), (77, 259594), (79, 253022), (106, 188573), (154, 129797), (158, 126511), (217, 92114), (341, 58618), (371, 53878), (434, 46057), (553, 36146), (583, 34286), (682, 29309), (742, 26939), (869, 23002), (1106, 18073), (1166, 17143), (1643, 12166), (1738, 11501), (2387, 8374), (2449, 8162), (3286, 6083), (4081, 4898), (4187, 4774)]