21148660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6257}}^1$

素因数の和:6292

約数の個数: 36

約数和(自身を含む): 48098988

約数和(自身を除く): 26950328

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6257, 12514, 25028, 31285, 62570, 81341, 125140, 162682, 325364, 406705, 813410, 1057433, 1626820, 2114866, 4229732, 5287165, 10574330, 21148660]

約数ペア:

[(1, 21148660), (2, 10574330), (4, 5287165), (5, 4229732), (10, 2114866), (13, 1626820), (20, 1057433), (26, 813410), (52, 406705), (65, 325364), (130, 162682), (169, 125140), (260, 81341), (338, 62570), (676, 31285), (845, 25028), (1690, 12514), (3380, 6257)]