21987206

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1\times {\mathrm{787}}^1$

素因数の和:1079

約数の個数: 16

約数和(自身を含む): 33710640

約数和(自身を除く): 11723434

約数列:

[1, 2, 61, 122, 229, 458, 787, 1574, 13969, 27938, 48007, 96014, 180223, 360446, 10993603, 21987206]

約数ペア:

[(1, 21987206), (2, 10993603), (61, 360446), (122, 180223), (229, 96014), (458, 48007), (787, 27938), (1574, 13969)]