21003944

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{201961}}^1$

素因数の和:201980

約数の個数: 16

約数和(自身を含む): 42412020

約数和(自身を除く): 21408076

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 201961, 403922, 807844, 1615688, 2625493, 5250986, 10501972, 21003944]

約数ペア:

[(1, 21003944), (2, 10501972), (4, 5250986), (8, 2625493), (13, 1615688), (26, 807844), (52, 403922), (104, 201961)]