21981518

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{44497}}^1$

素因数の和:44531

約数の個数: 16

約数和(自身を含む): 37378320

約数和(自身を除く): 15396802

約数列:

[1, 2, 13, 19, 26, 38, 247, 494, 44497, 88994, 578461, 845443, 1156922, 1690886, 10990759, 21981518]

約数ペア:

[(1, 21981518), (2, 10990759), (13, 1690886), (19, 1156922), (26, 845443), (38, 578461), (247, 88994), (494, 44497)]