20179427821

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1\times {\mathrm{491}}^1\times {\mathrm{643}}^1$

素因数の和:1561

約数の個数: 32

約数和(自身を含む): 24212256768

約数和(自身を除く): 4032828947

約数列:

[1, 7, 23, 161, 397, 491, 643, 2779, 3437, 4501, 9131, 11293, 14789, 63917, 79051, 103523, 194927, 255271, 315713, 1364489, 1786897, 2209991, 4483321, 5871233, 7261399, 31383247, 41098631, 50829793, 125338061, 877366427, 2882775403, 20179427821]

約数ペア:

[(1, 20179427821), (7, 2882775403), (23, 877366427), (161, 125338061), (397, 50829793), (491, 41098631), (643, 31383247), (2779, 7261399), (3437, 5871233), (4501, 4483321), (9131, 2209991), (11293, 1786897), (14789, 1364489), (63917, 315713), (79051, 255271), (103523, 194927)]