21097791

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^3\times {\mathrm{97}}^1$

素因数の和:153

約数の個数: 48

約数和(自身を含む): 36385440

約数和(自身を除く): 15287649

約数列:

[1, 3, 9, 11, 13, 33, 39, 97, 99, 117, 143, 169, 291, 429, 507, 873, 1067, 1261, 1287, 1521, 1859, 2197, 3201, 3783, 5577, 6591, 9603, 11349, 13871, 16393, 16731, 19773, 24167, 41613, 49179, 72501, 124839, 147537, 180323, 213109, 217503, 540969, 639327, 1622907, 1917981, 2344199, 7032597, 21097791]

約数ペア:

[(1, 21097791), (3, 7032597), (9, 2344199), (11, 1917981), (13, 1622907), (33, 639327), (39, 540969), (97, 217503), (99, 213109), (117, 180323), (143, 147537), (169, 124839), (291, 72501), (429, 49179), (507, 41613), (873, 24167), (1067, 19773), (1261, 16731), (1287, 16393), (1521, 13871), (1859, 11349), (2197, 9603), (3201, 6591), (3783, 5577)]