21268208

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102251}}^1$

素因数の和:102272

約数の個数: 20

約数和(自身を含む): 44377368

約数和(自身を除く): 23109160

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102251, 204502, 409004, 818008, 1329263, 1636016, 2658526, 5317052, 10634104, 21268208]

約数ペア:

[(1, 21268208), (2, 10634104), (4, 5317052), (8, 2658526), (13, 1636016), (16, 1329263), (26, 818008), (52, 409004), (104, 204502), (208, 102251)]