19996221

素因数分解:

$3^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{16139}}^1$

素因数の和:16208

約数の個数: 16

約数和(自身を含む): 30988800

約数和(自身を除く): 10992579

約数列:

[1, 3, 7, 21, 59, 177, 413, 1239, 16139, 48417, 112973, 338919, 952201, 2856603, 6665407, 19996221]

約数ペア:

[(1, 19996221), (3, 6665407), (7, 2856603), (21, 952201), (59, 338919), (177, 112973), (413, 48417), (1239, 16139)]