20881980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16573}}^1$

素因数の和:16595

約数の個数: 72

約数和(自身を含む): 72395232

約数和(自身を除く): 51513252

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16573, 33146, 49719, 66292, 82865, 99438, 116011, 149157, 165730, 198876, 232022, 248595, 298314, 331460, 348033, 464044, 497190, 580055, 596628, 696066, 745785, 994380, 1044099, 1160110, 1392132, 1491570, 1740165, 2088198, 2320220, 2983140, 3480330, 4176396, 5220495, 6960660, 10440990, 20881980]

約数ペア:

[(1, 20881980), (2, 10440990), (3, 6960660), (4, 5220495), (5, 4176396), (6, 3480330), (7, 2983140), (9, 2320220), (10, 2088198), (12, 1740165), (14, 1491570), (15, 1392132), (18, 1160110), (20, 1044099), (21, 994380), (28, 745785), (30, 696066), (35, 596628), (36, 580055), (42, 497190), (45, 464044), (60, 348033), (63, 331460), (70, 298314), (84, 248595), (90, 232022), (105, 198876), (126, 165730), (140, 149157), (180, 116011), (210, 99438), (252, 82865), (315, 66292), (420, 49719), (630, 33146), (1260, 16573)]