20838880

素因数分解:

$2^5\times 5^1\times {\mathrm{139}}^1\times {\mathrm{937}}^1$

素因数の和:1091

約数の個数: 48

約数和(自身を含む): 49638960

約数和(自身を除く): 28800080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 139, 160, 278, 556, 695, 937, 1112, 1390, 1874, 2224, 2780, 3748, 4448, 4685, 5560, 7496, 9370, 11120, 14992, 18740, 22240, 29984, 37480, 74960, 130243, 149920, 260486, 520972, 651215, 1041944, 1302430, 2083888, 2604860, 4167776, 5209720, 10419440, 20838880]

約数ペア:

[(1, 20838880), (2, 10419440), (4, 5209720), (5, 4167776), (8, 2604860), (10, 2083888), (16, 1302430), (20, 1041944), (32, 651215), (40, 520972), (80, 260486), (139, 149920), (160, 130243), (278, 74960), (556, 37480), (695, 29984), (937, 22240), (1112, 18740), (1390, 14992), (1874, 11120), (2224, 9370), (2780, 7496), (3748, 5560), (4448, 4685)]