21320960

素因数分解:

$2^8\times 5^1\times {\mathrm{16657}}^1$

素因数の和:16678

約数の個数: 36

約数和(自身を含む): 51073428

約数和(自身を除く): 29752468

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16657, 33314, 66628, 83285, 133256, 166570, 266512, 333140, 533024, 666280, 1066048, 1332560, 2132096, 2665120, 4264192, 5330240, 10660480, 21320960]

約数ペア:

[(1, 21320960), (2, 10660480), (4, 5330240), (5, 4264192), (8, 2665120), (10, 2132096), (16, 1332560), (20, 1066048), (32, 666280), (40, 533024), (64, 333140), (80, 266512), (128, 166570), (160, 133256), (256, 83285), (320, 66628), (640, 33314), (1280, 16657)]