19901200

素因数分解:

$2^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{4523}}^1$

素因数の和:4552

約数の個数: 60

約数和(自身を含む): 52170768

約数和(自身を除く): 32269568

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 176, 200, 220, 275, 400, 440, 550, 880, 1100, 2200, 4400, 4523, 9046, 18092, 22615, 36184, 45230, 49753, 72368, 90460, 99506, 113075, 180920, 199012, 226150, 248765, 361840, 398024, 452300, 497530, 796048, 904600, 995060, 1243825, 1809200, 1990120, 2487650, 3980240, 4975300, 9950600, 19901200]

約数ペア:

[(1, 19901200), (2, 9950600), (4, 4975300), (5, 3980240), (8, 2487650), (10, 1990120), (11, 1809200), (16, 1243825), (20, 995060), (22, 904600), (25, 796048), (40, 497530), (44, 452300), (50, 398024), (55, 361840), (80, 248765), (88, 226150), (100, 199012), (110, 180920), (176, 113075), (200, 99506), (220, 90460), (275, 72368), (400, 49753), (440, 45230), (550, 36184), (880, 22615), (1100, 18092), (2200, 9046), (4400, 4523)]