20915752

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:466

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 26258648

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 47, 52, 88, 94, 104, 143, 188, 286, 376, 389, 517, 572, 611, 778, 1034, 1144, 1222, 1556, 2068, 2444, 3112, 4136, 4279, 4888, 5057, 6721, 8558, 10114, 13442, 17116, 18283, 20228, 26884, 34232, 36566, 40456, 53768, 55627, 73132, 111254, 146264, 201113, 222508, 237679, 402226, 445016, 475358, 804452, 950716, 1608904, 1901432, 2614469, 5228938, 10457876, 20915752]

約数ペア:

[(1, 20915752), (2, 10457876), (4, 5228938), (8, 2614469), (11, 1901432), (13, 1608904), (22, 950716), (26, 804452), (44, 475358), (47, 445016), (52, 402226), (88, 237679), (94, 222508), (104, 201113), (143, 146264), (188, 111254), (286, 73132), (376, 55627), (389, 53768), (517, 40456), (572, 36566), (611, 34232), (778, 26884), (1034, 20228), (1144, 18283), (1222, 17116), (1556, 13442), (2068, 10114), (2444, 8558), (3112, 6721), (4136, 5057), (4279, 4888)]