21225945

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{337}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 40884480

約数和(自身を除く): 19658535

約数列:

[1, 3, 5, 13, 15, 17, 19, 39, 51, 57, 65, 85, 95, 195, 221, 247, 255, 285, 323, 337, 663, 741, 969, 1011, 1105, 1235, 1615, 1685, 3315, 3705, 4199, 4381, 4845, 5055, 5729, 6403, 12597, 13143, 17187, 19209, 20995, 21905, 28645, 32015, 62985, 65715, 74477, 83239, 85935, 96045, 108851, 223431, 249717, 326553, 372385, 416195, 544255, 1117155, 1248585, 1415063, 1632765, 4245189, 7075315, 21225945]

約数ペア:

[(1, 21225945), (3, 7075315), (5, 4245189), (13, 1632765), (15, 1415063), (17, 1248585), (19, 1117155), (39, 544255), (51, 416195), (57, 372385), (65, 326553), (85, 249717), (95, 223431), (195, 108851), (221, 96045), (247, 85935), (255, 83239), (285, 74477), (323, 65715), (337, 62985), (663, 32015), (741, 28645), (969, 21905), (1011, 20995), (1105, 19209), (1235, 17187), (1615, 13143), (1685, 12597), (3315, 6403), (3705, 5729), (4199, 5055), (4381, 4845)]