51021981

素因数分解:

$3^6\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1$

素因数の和:237

約数の個数: 56

約数和(自身を含む): 84991680

約数和(自身を除く): 33969699

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 81, 153, 179, 207, 243, 391, 459, 537, 621, 729, 1173, 1377, 1611, 1863, 3043, 3519, 4117, 4131, 4833, 5589, 9129, 10557, 12351, 12393, 14499, 16767, 27387, 31671, 37053, 43497, 69989, 82161, 95013, 111159, 130491, 209967, 246483, 285039, 333477, 629901, 739449, 1000431, 1889703, 2218347, 3001293, 5669109, 17007327, 51021981]

約数ペア:

[(1, 51021981), (3, 17007327), (9, 5669109), (17, 3001293), (23, 2218347), (27, 1889703), (51, 1000431), (69, 739449), (81, 629901), (153, 333477), (179, 285039), (207, 246483), (243, 209967), (391, 130491), (459, 111159), (537, 95013), (621, 82161), (729, 69989), (1173, 43497), (1377, 37053), (1611, 31671), (1863, 27387), (3043, 16767), (3519, 14499), (4117, 12393), (4131, 12351), (4833, 10557), (5589, 9129)]