19985812

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{347}}^1$

素因数の和:397

約数の個数: 72

約数和(自身を含む): 46654272

約数和(自身を除く): 26668460

約数列:

[1, 2, 4, 7, 11, 14, 17, 22, 28, 34, 44, 68, 77, 119, 121, 154, 187, 238, 242, 308, 347, 374, 476, 484, 694, 748, 847, 1309, 1388, 1694, 2057, 2429, 2618, 3388, 3817, 4114, 4858, 5236, 5899, 7634, 8228, 9716, 11798, 14399, 15268, 23596, 26719, 28798, 41293, 41987, 53438, 57596, 64889, 82586, 83974, 106876, 129778, 165172, 167948, 259556, 293909, 454223, 587818, 713779, 908446, 1175636, 1427558, 1816892, 2855116, 4996453, 9992906, 19985812]

約数ペア:

[(1, 19985812), (2, 9992906), (4, 4996453), (7, 2855116), (11, 1816892), (14, 1427558), (17, 1175636), (22, 908446), (28, 713779), (34, 587818), (44, 454223), (68, 293909), (77, 259556), (119, 167948), (121, 165172), (154, 129778), (187, 106876), (238, 83974), (242, 82586), (308, 64889), (347, 57596), (374, 53438), (476, 41987), (484, 41293), (694, 28798), (748, 26719), (847, 23596), (1309, 15268), (1388, 14399), (1694, 11798), (2057, 9716), (2429, 8228), (2618, 7634), (3388, 5899), (3817, 5236), (4114, 4858)]