20451840

素因数分解:

$2^9\times 3^1\times 5^1\times {\mathrm{2663}}^1$

素因数の和:2689

約数の個数: 80

約数和(自身を含む): 65406528

約数和(自身を除く): 44954688

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 256, 320, 384, 480, 512, 640, 768, 960, 1280, 1536, 1920, 2560, 2663, 3840, 5326, 7680, 7989, 10652, 13315, 15978, 21304, 26630, 31956, 39945, 42608, 53260, 63912, 79890, 85216, 106520, 127824, 159780, 170432, 213040, 255648, 319560, 340864, 426080, 511296, 639120, 681728, 852160, 1022592, 1278240, 1363456, 1704320, 2045184, 2556480, 3408640, 4090368, 5112960, 6817280, 10225920, 20451840]

約数ペア:

[(1, 20451840), (2, 10225920), (3, 6817280), (4, 5112960), (5, 4090368), (6, 3408640), (8, 2556480), (10, 2045184), (12, 1704320), (15, 1363456), (16, 1278240), (20, 1022592), (24, 852160), (30, 681728), (32, 639120), (40, 511296), (48, 426080), (60, 340864), (64, 319560), (80, 255648), (96, 213040), (120, 170432), (128, 159780), (160, 127824), (192, 106520), (240, 85216), (256, 79890), (320, 63912), (384, 53260), (480, 42608), (512, 39945), (640, 31956), (768, 26630), (960, 21304), (1280, 15978), (1536, 13315), (1920, 10652), (2560, 7989), (2663, 7680), (3840, 5326)]