21565648

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103681}}^1$

素因数の和:103702

約数の個数: 20

約数和(自身を含む): 44997988

約数和(自身を除く): 23432340

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103681, 207362, 414724, 829448, 1347853, 1658896, 2695706, 5391412, 10782824, 21565648]

約数ペア:

[(1, 21565648), (2, 10782824), (4, 5391412), (8, 2695706), (13, 1658896), (16, 1347853), (26, 829448), (52, 414724), (104, 207362), (208, 103681)]