81721221

素因数分解:

$3^1\times {\mathrm{101}}^1\times {\mathrm{173}}^1\times {\mathrm{1559}}^1$

素因数の和:1836

約数の個数: 16

約数和(自身を含む): 110747520

約数和(自身を除く): 29026299

約数列:

[1, 3, 101, 173, 303, 519, 1559, 4677, 17473, 52419, 157459, 269707, 472377, 809121, 27240407, 81721221]

約数ペア:

[(1, 81721221), (3, 27240407), (101, 809121), (173, 472377), (303, 269707), (519, 157459), (1559, 52419), (4677, 17473)]