20678000

素因数分解:

$2^4\times 5^3\times 7^2\times {\mathrm{211}}^1$

素因数の和:248

約数の個数: 120

約数和(自身を含む): 58438224

約数和(自身を除く): 37760224

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 125, 140, 175, 196, 200, 211, 245, 250, 280, 350, 392, 400, 422, 490, 500, 560, 700, 784, 844, 875, 980, 1000, 1055, 1225, 1400, 1477, 1688, 1750, 1960, 2000, 2110, 2450, 2800, 2954, 3376, 3500, 3920, 4220, 4900, 5275, 5908, 6125, 7000, 7385, 8440, 9800, 10339, 10550, 11816, 12250, 14000, 14770, 16880, 19600, 20678, 21100, 23632, 24500, 26375, 29540, 36925, 41356, 42200, 49000, 51695, 52750, 59080, 73850, 82712, 84400, 98000, 103390, 105500, 118160, 147700, 165424, 184625, 206780, 211000, 258475, 295400, 369250, 413560, 422000, 516950, 590800, 738500, 827120, 1033900, 1292375, 1477000, 2067800, 2584750, 2954000, 4135600, 5169500, 10339000, 20678000]

約数ペア:

[(1, 20678000), (2, 10339000), (4, 5169500), (5, 4135600), (7, 2954000), (8, 2584750), (10, 2067800), (14, 1477000), (16, 1292375), (20, 1033900), (25, 827120), (28, 738500), (35, 590800), (40, 516950), (49, 422000), (50, 413560), (56, 369250), (70, 295400), (80, 258475), (98, 211000), (100, 206780), (112, 184625), (125, 165424), (140, 147700), (175, 118160), (196, 105500), (200, 103390), (211, 98000), (245, 84400), (250, 82712), (280, 73850), (350, 59080), (392, 52750), (400, 51695), (422, 49000), (490, 42200), (500, 41356), (560, 36925), (700, 29540), (784, 26375), (844, 24500), (875, 23632), (980, 21100), (1000, 20678), (1055, 19600), (1225, 16880), (1400, 14770), (1477, 14000), (1688, 12250), (1750, 11816), (1960, 10550), (2000, 10339), (2110, 9800), (2450, 8440), (2800, 7385), (2954, 7000), (3376, 6125), (3500, 5908), (3920, 5275), (4220, 4900)]