21248973

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13807}}^1$

素因数の和:13838

約数の個数: 20

約数和(自身を含む): 33415360

約数和(自身を除く): 12166387

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13807, 41421, 124263, 262333, 372789, 786999, 1118367, 2360997, 7082991, 21248973]

約数ペア:

[(1, 21248973), (3, 7082991), (9, 2360997), (19, 1118367), (27, 786999), (57, 372789), (81, 262333), (171, 124263), (513, 41421), (1539, 13807)]