21153321

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19751}}^1$

素因数の和:19781

約数の個数: 24

約数和(自身を含む): 36975744

約数和(自身を除く): 15822423

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19751, 59253, 138257, 177759, 335767, 414771, 1007301, 1244313, 2350369, 3021903, 7051107, 21153321]

約数ペア:

[(1, 21153321), (3, 7051107), (7, 3021903), (9, 2350369), (17, 1244313), (21, 1007301), (51, 414771), (63, 335767), (119, 177759), (153, 138257), (357, 59253), (1071, 19751)]