28076720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{277}}^1$

素因数の和:478

約数の個数: 80

約数和(自身を含む): 75286848

約数和(自身を除く): 47210128

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 181, 277, 280, 362, 554, 560, 724, 905, 1108, 1267, 1385, 1448, 1810, 1939, 2216, 2534, 2770, 2896, 3620, 3878, 4432, 5068, 5540, 6335, 7240, 7756, 9695, 10136, 11080, 12670, 14480, 15512, 19390, 20272, 22160, 25340, 31024, 38780, 50137, 50680, 77560, 100274, 101360, 155120, 200548, 250685, 350959, 401096, 501370, 701918, 802192, 1002740, 1403836, 1754795, 2005480, 2807672, 3509590, 4010960, 5615344, 7019180, 14038360, 28076720]

約数ペア:

[(1, 28076720), (2, 14038360), (4, 7019180), (5, 5615344), (7, 4010960), (8, 3509590), (10, 2807672), (14, 2005480), (16, 1754795), (20, 1403836), (28, 1002740), (35, 802192), (40, 701918), (56, 501370), (70, 401096), (80, 350959), (112, 250685), (140, 200548), (181, 155120), (277, 101360), (280, 100274), (362, 77560), (554, 50680), (560, 50137), (724, 38780), (905, 31024), (1108, 25340), (1267, 22160), (1385, 20272), (1448, 19390), (1810, 15512), (1939, 14480), (2216, 12670), (2534, 11080), (2770, 10136), (2896, 9695), (3620, 7756), (3878, 7240), (4432, 6335), (5068, 5540)]