21149648

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101681}}^1$

素因数の和:101702

約数の個数: 20

約数和(自身を含む): 44129988

約数和(自身を除く): 22980340

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 101681, 203362, 406724, 813448, 1321853, 1626896, 2643706, 5287412, 10574824, 21149648]

約数ペア:

[(1, 21149648), (2, 10574824), (4, 5287412), (8, 2643706), (13, 1626896), (16, 1321853), (26, 813448), (52, 406724), (104, 203362), (208, 101681)]