21207857

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 26542080

約数和(自身を除く): 5334223

約数列:

[1, 11, 17, 19, 47, 127, 187, 209, 323, 517, 799, 893, 1397, 2159, 2413, 3553, 5969, 8789, 9823, 15181, 23749, 26543, 41021, 65659, 101473, 113411, 166991, 451231, 1116203, 1247521, 1927987, 21207857]

約数ペア:

[(1, 21207857), (11, 1927987), (17, 1247521), (19, 1116203), (47, 451231), (127, 166991), (187, 113411), (209, 101473), (323, 65659), (517, 41021), (799, 26543), (893, 23749), (1397, 15181), (2159, 9823), (2413, 8789), (3553, 5969)]