21021572

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{13}}^2\times {\mathrm{257}}^1$

素因数の和:309

約数の個数: 54

約数和(自身を含む): 43956234

約数和(自身を除く): 22934662

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 121, 143, 169, 242, 257, 286, 338, 484, 514, 572, 676, 1028, 1573, 1859, 2827, 3146, 3341, 3718, 5654, 6292, 6682, 7436, 11308, 13364, 20449, 31097, 36751, 40898, 43433, 62194, 73502, 81796, 86866, 124388, 147004, 173732, 404261, 477763, 808522, 955526, 1617044, 1911052, 5255393, 10510786, 21021572]

約数ペア:

[(1, 21021572), (2, 10510786), (4, 5255393), (11, 1911052), (13, 1617044), (22, 955526), (26, 808522), (44, 477763), (52, 404261), (121, 173732), (143, 147004), (169, 124388), (242, 86866), (257, 81796), (286, 73502), (338, 62194), (484, 43433), (514, 40898), (572, 36751), (676, 31097), (1028, 20449), (1573, 13364), (1859, 11308), (2827, 7436), (3146, 6682), (3341, 6292), (3718, 5654)]