21293129

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{461}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 6648631

約数列:

[1, 11, 13, 17, 19, 143, 187, 209, 221, 247, 323, 461, 2431, 2717, 3553, 4199, 5071, 5993, 7837, 8759, 46189, 65923, 86207, 96349, 101881, 113867, 148903, 1120691, 1252537, 1637933, 1935739, 21293129]

約数ペア:

[(1, 21293129), (11, 1935739), (13, 1637933), (17, 1252537), (19, 1120691), (143, 148903), (187, 113867), (209, 101881), (221, 96349), (247, 86207), (323, 65923), (461, 46189), (2431, 8759), (2717, 7837), (3553, 5993), (4199, 5071)]