20958028

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:183

約数の個数: 72

約数和(自身を含む): 46894848

約数和(自身を除く): 25936820

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 43, 52, 86, 91, 103, 169, 172, 182, 206, 301, 338, 364, 412, 559, 602, 676, 721, 1118, 1183, 1204, 1339, 1442, 2236, 2366, 2678, 2884, 3913, 4429, 4732, 5356, 7267, 7826, 8858, 9373, 14534, 15652, 17407, 17716, 18746, 29068, 31003, 34814, 37492, 50869, 57577, 62006, 69628, 101738, 115154, 121849, 124012, 203476, 230308, 243698, 403039, 487396, 748501, 806078, 1497002, 1612156, 2994004, 5239507, 10479014, 20958028]

約数ペア:

[(1, 20958028), (2, 10479014), (4, 5239507), (7, 2994004), (13, 1612156), (14, 1497002), (26, 806078), (28, 748501), (43, 487396), (52, 403039), (86, 243698), (91, 230308), (103, 203476), (169, 124012), (172, 121849), (182, 115154), (206, 101738), (301, 69628), (338, 62006), (364, 57577), (412, 50869), (559, 37492), (602, 34814), (676, 31003), (721, 29068), (1118, 18746), (1183, 17716), (1204, 17407), (1339, 15652), (1442, 14534), (2236, 9373), (2366, 8858), (2678, 7826), (2884, 7267), (3913, 5356), (4429, 4732)]