19940480

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4451}}^1$

素因数の和:4477

約数の個数: 64

約数和(自身を含む): 54492480

約数和(自身を除く): 34552000

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, 280, 320, 448, 560, 640, 896, 1120, 2240, 4451, 4480, 8902, 17804, 22255, 31157, 35608, 44510, 62314, 71216, 89020, 124628, 142432, 155785, 178040, 249256, 284864, 311570, 356080, 498512, 569728, 623140, 712160, 997024, 1246280, 1424320, 1994048, 2492560, 2848640, 3988096, 4985120, 9970240, 19940480]

約数ペア:

[(1, 19940480), (2, 9970240), (4, 4985120), (5, 3988096), (7, 2848640), (8, 2492560), (10, 1994048), (14, 1424320), (16, 1246280), (20, 997024), (28, 712160), (32, 623140), (35, 569728), (40, 498512), (56, 356080), (64, 311570), (70, 284864), (80, 249256), (112, 178040), (128, 155785), (140, 142432), (160, 124628), (224, 89020), (280, 71216), (320, 62314), (448, 44510), (560, 35608), (640, 31157), (896, 22255), (1120, 17804), (2240, 8902), (4451, 4480)]