19684040

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:350

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 26971960

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 232, 239, 284, 290, 355, 478, 568, 580, 710, 956, 1160, 1195, 1420, 1912, 2059, 2390, 2840, 4118, 4780, 6931, 8236, 9560, 10295, 13862, 16472, 16969, 20590, 27724, 33938, 34655, 41180, 55448, 67876, 69310, 82360, 84845, 135752, 138620, 169690, 277240, 339380, 492101, 678760, 984202, 1968404, 2460505, 3936808, 4921010, 9842020, 19684040]

約数ペア:

[(1, 19684040), (2, 9842020), (4, 4921010), (5, 3936808), (8, 2460505), (10, 1968404), (20, 984202), (29, 678760), (40, 492101), (58, 339380), (71, 277240), (116, 169690), (142, 138620), (145, 135752), (232, 84845), (239, 82360), (284, 69310), (290, 67876), (355, 55448), (478, 41180), (568, 34655), (580, 33938), (710, 27724), (956, 20590), (1160, 16969), (1195, 16472), (1420, 13862), (1912, 10295), (2059, 9560), (2390, 8236), (2840, 6931), (4118, 4780)]