19997996

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{1999}}^1$

素因数の和:2105

約数の個数: 24

約数和(自身を含む): 36456000

約数和(自身を除く): 16458004

約数列:

[1, 2, 4, 41, 61, 82, 122, 164, 244, 1999, 2501, 3998, 5002, 7996, 10004, 81959, 121939, 163918, 243878, 327836, 487756, 4999499, 9998998, 19997996]

約数ペア:

[(1, 19997996), (2, 9998998), (4, 4999499), (41, 487756), (61, 327836), (82, 243878), (122, 163918), (164, 121939), (244, 81959), (1999, 10004), (2501, 7996), (3998, 5002)]