17920

素因数分解:

$2^9\times 5^1\times 7^1$

素因数の和:30

約数の個数: 40

約数和(自身を含む): 49104

約数和(自身を除く): 31184

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 512, 560, 640, 896, 1120, 1280, 1792, 2240, 2560, 3584, 4480, 8960, 17920]

約数ペア:

[(1, 17920), (2, 8960), (4, 4480), (5, 3584), (7, 2560), (8, 2240), (10, 1792), (14, 1280), (16, 1120), (20, 896), (28, 640), (32, 560), (35, 512), (40, 448), (56, 320), (64, 280), (70, 256), (80, 224), (112, 160), (128, 140)]