21654308

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{103}}^1\times {\mathrm{311}}^1$

素因数の和:444

約数の個数: 36

約数和(自身を含む): 41565888

約数和(自身を除く): 19911580

約数列:

[1, 2, 4, 13, 26, 52, 103, 169, 206, 311, 338, 412, 622, 676, 1244, 1339, 2678, 4043, 5356, 8086, 16172, 17407, 32033, 34814, 52559, 64066, 69628, 105118, 128132, 210236, 416429, 832858, 1665716, 5413577, 10827154, 21654308]

約数ペア:

[(1, 21654308), (2, 10827154), (4, 5413577), (13, 1665716), (26, 832858), (52, 416429), (103, 210236), (169, 128132), (206, 105118), (311, 69628), (338, 64066), (412, 52559), (622, 34814), (676, 32033), (1244, 17407), (1339, 16172), (2678, 8086), (4043, 5356)]