19988840

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{21727}}^1$

素因数の和:21761

約数の個数: 32

約数和(自身を含む): 46932480

約数和(自身を除く): 26943640

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 21727, 43454, 86908, 108635, 173816, 217270, 434540, 499721, 869080, 999442, 1998884, 2498605, 3997768, 4997210, 9994420, 19988840]

約数ペア:

[(1, 19988840), (2, 9994420), (4, 4997210), (5, 3997768), (8, 2498605), (10, 1998884), (20, 999442), (23, 869080), (40, 499721), (46, 434540), (92, 217270), (115, 173816), (184, 108635), (230, 86908), (460, 43454), (920, 21727)]