19988495

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{2381}}^1$

素因数の和:2482

約数の個数: 16

約数和(自身を含む): 25382592

約数和(自身を除く): 5394097

約数列:

[1, 5, 23, 73, 115, 365, 1679, 2381, 8395, 11905, 54763, 173813, 273815, 869065, 3997699, 19988495]

約数ペア:

[(1, 19988495), (5, 3997699), (23, 869065), (73, 273815), (115, 173813), (365, 54763), (1679, 11905), (2381, 8395)]