19996522

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{281}}^1$

素因数の和:343

約数の個数: 64

約数和(自身を含む): 40932864

約数和(自身を除く): 20936342

約数列:

[1, 2, 7, 13, 14, 17, 23, 26, 34, 46, 91, 119, 161, 182, 221, 238, 281, 299, 322, 391, 442, 562, 598, 782, 1547, 1967, 2093, 2737, 3094, 3653, 3934, 4186, 4777, 5083, 5474, 6463, 7306, 9554, 10166, 12926, 25571, 33439, 35581, 45241, 51142, 62101, 66878, 71162, 84019, 90482, 109871, 124202, 168038, 219742, 434707, 588133, 769097, 869414, 1176266, 1428323, 1538194, 2856646, 9998261, 19996522]

約数ペア:

[(1, 19996522), (2, 9998261), (7, 2856646), (13, 1538194), (14, 1428323), (17, 1176266), (23, 869414), (26, 769097), (34, 588133), (46, 434707), (91, 219742), (119, 168038), (161, 124202), (182, 109871), (221, 90482), (238, 84019), (281, 71162), (299, 66878), (322, 62101), (391, 51142), (442, 45241), (562, 35581), (598, 33439), (782, 25571), (1547, 12926), (1967, 10166), (2093, 9554), (2737, 7306), (3094, 6463), (3653, 5474), (3934, 5083), (4186, 4777)]