81457300

素因数分解:

$2^2\times 5^2\times {\mathrm{647}}^1\times {\mathrm{1259}}^1$

素因数の和:1920

約数の個数: 36

約数和(自身を含む): 177176160

約数和(自身を除く): 95718860

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 647, 1259, 1294, 2518, 2588, 3235, 5036, 6295, 6470, 12590, 12940, 16175, 25180, 31475, 32350, 62950, 64700, 125900, 814573, 1629146, 3258292, 4072865, 8145730, 16291460, 20364325, 40728650, 81457300]

約数ペア:

[(1, 81457300), (2, 40728650), (4, 20364325), (5, 16291460), (10, 8145730), (20, 4072865), (25, 3258292), (50, 1629146), (100, 814573), (647, 125900), (1259, 64700), (1294, 62950), (2518, 32350), (2588, 31475), (3235, 25180), (5036, 16175), (6295, 12940), (6470, 12590)]