20838160

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{293}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 55996416

約数和(自身を除く): 35158256

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 127, 140, 254, 280, 293, 508, 560, 586, 635, 889, 1016, 1172, 1270, 1465, 1778, 2032, 2051, 2344, 2540, 2930, 3556, 4102, 4445, 4688, 5080, 5860, 7112, 8204, 8890, 10160, 10255, 11720, 14224, 16408, 17780, 20510, 23440, 32816, 35560, 37211, 41020, 71120, 74422, 82040, 148844, 164080, 186055, 260477, 297688, 372110, 520954, 595376, 744220, 1041908, 1302385, 1488440, 2083816, 2604770, 2976880, 4167632, 5209540, 10419080, 20838160]

約数ペア:

[(1, 20838160), (2, 10419080), (4, 5209540), (5, 4167632), (7, 2976880), (8, 2604770), (10, 2083816), (14, 1488440), (16, 1302385), (20, 1041908), (28, 744220), (35, 595376), (40, 520954), (56, 372110), (70, 297688), (80, 260477), (112, 186055), (127, 164080), (140, 148844), (254, 82040), (280, 74422), (293, 71120), (508, 41020), (560, 37211), (586, 35560), (635, 32816), (889, 23440), (1016, 20510), (1172, 17780), (1270, 16408), (1465, 14224), (1778, 11720), (2032, 10255), (2051, 10160), (2344, 8890), (2540, 8204), (2930, 7112), (3556, 5860), (4102, 5080), (4445, 4688)]