21565000

素因数分解:

$2^3\times 5^4\times {\mathrm{19}}^1\times {\mathrm{227}}^1$

素因数の和:272

約数の個数: 80

約数和(自身を含む): 53420400

約数和(自身を除く): 31855400

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 125, 152, 190, 200, 227, 250, 380, 454, 475, 500, 625, 760, 908, 950, 1000, 1135, 1250, 1816, 1900, 2270, 2375, 2500, 3800, 4313, 4540, 4750, 5000, 5675, 8626, 9080, 9500, 11350, 11875, 17252, 19000, 21565, 22700, 23750, 28375, 34504, 43130, 45400, 47500, 56750, 86260, 95000, 107825, 113500, 141875, 172520, 215650, 227000, 283750, 431300, 539125, 567500, 862600, 1078250, 1135000, 2156500, 2695625, 4313000, 5391250, 10782500, 21565000]

約数ペア:

[(1, 21565000), (2, 10782500), (4, 5391250), (5, 4313000), (8, 2695625), (10, 2156500), (19, 1135000), (20, 1078250), (25, 862600), (38, 567500), (40, 539125), (50, 431300), (76, 283750), (95, 227000), (100, 215650), (125, 172520), (152, 141875), (190, 113500), (200, 107825), (227, 95000), (250, 86260), (380, 56750), (454, 47500), (475, 45400), (500, 43130), (625, 34504), (760, 28375), (908, 23750), (950, 22700), (1000, 21565), (1135, 19000), (1250, 17252), (1816, 11875), (1900, 11350), (2270, 9500), (2375, 9080), (2500, 8626), (3800, 5675), (4313, 5000), (4540, 4750)]