1638

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{13}}^1$

素因数の和:28

約数の個数: 24

約数和(自身を含む): 4368

約数和(自身を除く): 2730

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 26, 39, 42, 63, 78, 91, 117, 126, 182, 234, 273, 546, 819, 1638]

約数ペア:

[(1, 1638), (2, 819), (3, 546), (6, 273), (7, 234), (9, 182), (13, 126), (14, 117), (18, 91), (21, 78), (26, 63), (39, 42)]