221043263

素因数分解:

$7^4\times {\mathrm{43}}^1\times {\mathrm{2141}}^1$

素因数の和:2212

約数の個数: 20

約数和(自身を含む): 263988648

約数和(自身を除く): 42945385

約数列:

[1, 7, 43, 49, 301, 343, 2107, 2141, 2401, 14749, 14987, 92063, 103243, 104909, 644441, 734363, 4511087, 5140541, 31577609, 221043263]

約数ペア:

[(1, 221043263), (7, 31577609), (43, 5140541), (49, 4511087), (301, 734363), (343, 644441), (2107, 104909), (2141, 103243), (2401, 92063), (14749, 14987)]