639437757

素因数分解:

$3^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{157769}}^1$

素因数の和:157972

約数の個数: 16

約数和(自身を含む): 979436160

約数和(自身を除く): 339998403

約数列:

[1, 3, 7, 21, 193, 579, 1351, 4053, 157769, 473307, 1104383, 3313149, 30449417, 91348251, 213145919, 639437757]

約数ペア:

[(1, 639437757), (3, 213145919), (7, 91348251), (21, 30449417), (193, 3313149), (579, 1104383), (1351, 473307), (4053, 157769)]