81021825

素因数分解:

$3^2\times 5^2\times {\mathrm{293}}^1\times {\mathrm{1229}}^1$

素因数の和:1538

約数の個数: 36

約数和(自身を含む): 145732860

約数和(自身を除く): 64711035

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 293, 879, 1229, 1465, 2637, 3687, 4395, 6145, 7325, 11061, 13185, 18435, 21975, 30725, 55305, 65925, 92175, 276525, 360097, 1080291, 1800485, 3240873, 5401455, 9002425, 16204365, 27007275, 81021825]

約数ペア:

[(1, 81021825), (3, 27007275), (5, 16204365), (9, 9002425), (15, 5401455), (25, 3240873), (45, 1800485), (75, 1080291), (225, 360097), (293, 276525), (879, 92175), (1229, 65925), (1465, 55305), (2637, 30725), (3687, 21975), (4395, 18435), (6145, 13185), (7325, 11061)]