221036781

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{256721}}^1$

素因数の和:256772

約数の個数: 16

約数和(自身を含む): 345034368

約数和(自身を除く): 123997587

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 256721, 770163, 1797047, 5391141, 10525561, 31576683, 73678927, 221036781]

約数ペア:

[(1, 221036781), (3, 73678927), (7, 31576683), (21, 10525561), (41, 5391141), (123, 1797047), (287, 770163), (861, 256721)]