1890

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1$

素因数の和:23

約数の個数: 32

約数和(自身を含む): 5760

約数和(自身を除く): 3870

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 90, 105, 126, 135, 189, 210, 270, 315, 378, 630, 945, 1890]

約数ペア:

[(1, 1890), (2, 945), (3, 630), (5, 378), (6, 315), (7, 270), (9, 210), (10, 189), (14, 135), (15, 126), (18, 105), (21, 90), (27, 70), (30, 63), (35, 54), (42, 45)]