21000891231

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{49499}}^1$

素因数の和:49628

約数の個数: 48

約数和(自身を含む): 33359040000

約数和(自身を除く): 12358148769

約数列:

[1, 3, 9, 17, 47, 51, 59, 141, 153, 177, 423, 531, 799, 1003, 2397, 2773, 3009, 7191, 8319, 9027, 24957, 47141, 49499, 141423, 148497, 424269, 445491, 841483, 2326453, 2524449, 2920441, 6979359, 7573347, 8761323, 20938077, 26283969, 39549701, 49647497, 118649103, 137260727, 148942491, 355947309, 411782181, 446827473, 1235346543, 2333432359, 7000297077, 21000891231]

約数ペア:

[(1, 21000891231), (3, 7000297077), (9, 2333432359), (17, 1235346543), (47, 446827473), (51, 411782181), (59, 355947309), (141, 148942491), (153, 137260727), (177, 118649103), (423, 49647497), (531, 39549701), (799, 26283969), (1003, 20938077), (2397, 8761323), (2773, 7573347), (3009, 6979359), (7191, 2920441), (8319, 2524449), (9027, 2326453), (24957, 841483), (47141, 445491), (49499, 424269), (141423, 148497)]