20687800

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{2111}}^1$

素因数の和:2141

約数の個数: 72

約数和(自身を含む): 55978560

約数和(自身を除く): 35290760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 56, 70, 98, 100, 140, 175, 196, 200, 245, 280, 350, 392, 490, 700, 980, 1225, 1400, 1960, 2111, 2450, 4222, 4900, 8444, 9800, 10555, 14777, 16888, 21110, 29554, 42220, 52775, 59108, 73885, 84440, 103439, 105550, 118216, 147770, 206878, 211100, 295540, 369425, 413756, 422200, 517195, 591080, 738850, 827512, 1034390, 1477700, 2068780, 2585975, 2955400, 4137560, 5171950, 10343900, 20687800]

約数ペア:

[(1, 20687800), (2, 10343900), (4, 5171950), (5, 4137560), (7, 2955400), (8, 2585975), (10, 2068780), (14, 1477700), (20, 1034390), (25, 827512), (28, 738850), (35, 591080), (40, 517195), (49, 422200), (50, 413756), (56, 369425), (70, 295540), (98, 211100), (100, 206878), (140, 147770), (175, 118216), (196, 105550), (200, 103439), (245, 84440), (280, 73885), (350, 59108), (392, 52775), (490, 42220), (700, 29554), (980, 21110), (1225, 16888), (1400, 14777), (1960, 10555), (2111, 9800), (2450, 8444), (4222, 4900)]