19880144

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{20369}}^1$

素因数の和:20438

約数の個数: 20

約数和(自身を含む): 39151140

約数和(自身を除く): 19270996

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 20369, 40738, 81476, 162952, 325904, 1242509, 2485018, 4970036, 9940072, 19880144]

約数ペア:

[(1, 19880144), (2, 9940072), (4, 4970036), (8, 2485018), (16, 1242509), (61, 325904), (122, 162952), (244, 81476), (488, 40738), (976, 20369)]