21276950

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 41341104

約数和(自身を除く): 20064154

約数列:

[1, 2, 5, 10, 25, 41, 50, 82, 97, 107, 194, 205, 214, 410, 485, 535, 970, 1025, 1070, 2050, 2425, 2675, 3977, 4387, 4850, 5350, 7954, 8774, 10379, 19885, 20758, 21935, 39770, 43870, 51895, 99425, 103790, 109675, 198850, 219350, 259475, 425539, 518950, 851078, 2127695, 4255390, 10638475, 21276950]

約数ペア:

[(1, 21276950), (2, 10638475), (5, 4255390), (10, 2127695), (25, 851078), (41, 518950), (50, 425539), (82, 259475), (97, 219350), (107, 198850), (194, 109675), (205, 103790), (214, 99425), (410, 51895), (485, 43870), (535, 39770), (970, 21935), (1025, 20758), (1070, 19885), (2050, 10379), (2425, 8774), (2675, 7954), (3977, 5350), (4387, 4850)]