16990420

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1669}}^1$

素因数の和:2187

約数の個数: 24

約数和(自身を含む): 35771400

約数和(自身を除く): 18780980

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1669, 2036, 2545, 3338, 5090, 6676, 8345, 10180, 16690, 33380, 849521, 1699042, 3398084, 4247605, 8495210, 16990420]

約数ペア:

[(1, 16990420), (2, 8495210), (4, 4247605), (5, 3398084), (10, 1699042), (20, 849521), (509, 33380), (1018, 16690), (1669, 10180), (2036, 8345), (2545, 6676), (3338, 5090)]