21063760

素因数分解:

$2^4\times 5^1\times {\mathrm{281}}^1\times {\mathrm{937}}^1$

素因数の和:1231

約数の個数: 40

約数和(自身を含む): 49199976

約数和(自身を除く): 28136216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 281, 562, 937, 1124, 1405, 1874, 2248, 2810, 3748, 4496, 4685, 5620, 7496, 9370, 11240, 14992, 18740, 22480, 37480, 74960, 263297, 526594, 1053188, 1316485, 2106376, 2632970, 4212752, 5265940, 10531880, 21063760]

約数ペア:

[(1, 21063760), (2, 10531880), (4, 5265940), (5, 4212752), (8, 2632970), (10, 2106376), (16, 1316485), (20, 1053188), (40, 526594), (80, 263297), (281, 74960), (562, 37480), (937, 22480), (1124, 18740), (1405, 14992), (1874, 11240), (2248, 9370), (2810, 7496), (3748, 5620), (4496, 4685)]