21221210

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19469}}^1$

素因数の和:19585

約数の個数: 16

約数和(自身を含む): 38550600

約数和(自身を除く): 17329390

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19469, 38938, 97345, 194690, 2122121, 4244242, 10610605, 21221210]

約数ペア:

[(1, 21221210), (2, 10610605), (5, 4244242), (10, 2122121), (109, 194690), (218, 97345), (545, 38938), (1090, 19469)]