19985744

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{73477}}^1$

素因数の和:73502

約数の個数: 20

約数和(自身を含む): 41000724

約数和(自身を除く): 21014980

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 73477, 146954, 293908, 587816, 1175632, 1249109, 2498218, 4996436, 9992872, 19985744]

約数ペア:

[(1, 19985744), (2, 9992872), (4, 4996436), (8, 2498218), (16, 1249109), (17, 1175632), (34, 587816), (68, 293908), (136, 146954), (272, 73477)]