81810590

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{21031}}^1$

素因数の和:21427

約数の個数: 16

約数和(自身を含む): 147644640

約数和(自身を除く): 65834050

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 21031, 42062, 105155, 210310, 8181059, 16362118, 40905295, 81810590]

約数ペア:

[(1, 81810590), (2, 40905295), (5, 16362118), (10, 8181059), (389, 210310), (778, 105155), (1945, 42062), (3890, 21031)]