19957847

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 28153440

約数和(自身を除く): 8195593

約数列:

[1, 7, 13, 17, 19, 49, 91, 97, 119, 133, 221, 247, 323, 637, 679, 833, 931, 1261, 1547, 1649, 1729, 1843, 2261, 4199, 4753, 8827, 10829, 11543, 12103, 12901, 15827, 21437, 23959, 29393, 31331, 61789, 80801, 90307, 150059, 167713, 205751, 219317, 407303, 1050413, 1173991, 1535219, 2851121, 19957847]

約数ペア:

[(1, 19957847), (7, 2851121), (13, 1535219), (17, 1173991), (19, 1050413), (49, 407303), (91, 219317), (97, 205751), (119, 167713), (133, 150059), (221, 90307), (247, 80801), (323, 61789), (637, 31331), (679, 29393), (833, 23959), (931, 21437), (1261, 15827), (1547, 12901), (1649, 12103), (1729, 11543), (1843, 10829), (2261, 8827), (4199, 4753)]