19997912

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{73}}^1\times {\mathrm{283}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 41926920

約数和(自身を除く): 21929008

約数列:

[1, 2, 4, 8, 11, 22, 44, 73, 88, 121, 146, 242, 283, 292, 484, 566, 584, 803, 968, 1132, 1606, 2264, 3113, 3212, 6226, 6424, 8833, 12452, 17666, 20659, 24904, 34243, 35332, 41318, 68486, 70664, 82636, 136972, 165272, 227249, 273944, 454498, 908996, 1817992, 2499739, 4999478, 9998956, 19997912]

約数ペア:

[(1, 19997912), (2, 9998956), (4, 4999478), (8, 2499739), (11, 1817992), (22, 908996), (44, 454498), (73, 273944), (88, 227249), (121, 165272), (146, 136972), (242, 82636), (283, 70664), (292, 68486), (484, 41318), (566, 35332), (584, 34243), (803, 24904), (968, 20659), (1132, 17666), (1606, 12452), (2264, 8833), (3113, 6424), (3212, 6226)]