21305690

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{43481}}^1$

素因数の和:43502

約数の個数: 24

約数和(自身を含む): 44612532

約数和(自身を除く): 23306842

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 43481, 86962, 217405, 304367, 434810, 608734, 1521835, 2130569, 3043670, 4261138, 10652845, 21305690]

約数ペア:

[(1, 21305690), (2, 10652845), (5, 4261138), (7, 3043670), (10, 2130569), (14, 1521835), (35, 608734), (49, 434810), (70, 304367), (98, 217405), (245, 86962), (490, 43481)]