21871095

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{431}}^1$

素因数の和:655

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 15453705

約数列:

[1, 3, 5, 15, 17, 51, 85, 199, 255, 431, 597, 995, 1293, 2155, 2985, 3383, 6465, 7327, 10149, 16915, 21981, 36635, 50745, 85769, 109905, 257307, 428845, 1286535, 1458073, 4374219, 7290365, 21871095]

約数ペア:

[(1, 21871095), (3, 7290365), (5, 4374219), (15, 1458073), (17, 1286535), (51, 428845), (85, 257307), (199, 109905), (255, 85769), (431, 50745), (597, 36635), (995, 21981), (1293, 16915), (2155, 10149), (2985, 7327), (3383, 6465)]