681291

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{647}}^1$

素因数の和:672

約数の個数: 20

約数和(自身を含む): 1097712

約数和(自身を除く): 416421

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 647, 1053, 1941, 5823, 8411, 17469, 25233, 52407, 75699, 227097, 681291]

約数ペア:

[(1, 681291), (3, 227097), (9, 75699), (13, 52407), (27, 25233), (39, 17469), (81, 8411), (117, 5823), (351, 1941), (647, 1053)]