21495969

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{461}}^1$

素因数の和:638

約数の個数: 32

約数和(自身を含む): 35038080

約数和(自身を除く): 13542111

約数列:

[1, 3, 9, 11, 27, 33, 99, 157, 297, 461, 471, 1383, 1413, 1727, 4149, 4239, 5071, 5181, 12447, 15213, 15543, 45639, 46629, 72377, 136917, 217131, 651393, 796147, 1954179, 2388441, 7165323, 21495969]

約数ペア:

[(1, 21495969), (3, 7165323), (9, 2388441), (11, 1954179), (27, 796147), (33, 651393), (99, 217131), (157, 136917), (297, 72377), (461, 46629), (471, 45639), (1383, 15543), (1413, 15213), (1727, 12447), (4149, 5181), (4239, 5071)]