21110680

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1697}}^1$

素因数の和:2019

約数の個数: 32

約数和(自身を含む): 47679840

約数和(自身を除く): 26569160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 1697, 2488, 3110, 3394, 6220, 6788, 8485, 12440, 13576, 16970, 33940, 67880, 527767, 1055534, 2111068, 2638835, 4222136, 5277670, 10555340, 21110680]

約数ペア:

[(1, 21110680), (2, 10555340), (4, 5277670), (5, 4222136), (8, 2638835), (10, 2111068), (20, 1055534), (40, 527767), (311, 67880), (622, 33940), (1244, 16970), (1555, 13576), (1697, 12440), (2488, 8485), (3110, 6788), (3394, 6220)]