1721979

素因数分解:

$3^4\times 7^1\times {\mathrm{3037}}^1$

素因数の和:3056

約数の個数: 20

約数和(自身を含む): 2940784

約数和(自身を除く): 1218805

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 3037, 9111, 21259, 27333, 63777, 81999, 191331, 245997, 573993, 1721979]

約数ペア:

[(1, 1721979), (3, 573993), (7, 245997), (9, 191331), (21, 81999), (27, 63777), (63, 27333), (81, 21259), (189, 9111), (567, 3037)]