21251500

素因数分解:

$2^2\times 5^3\times {\mathrm{19}}^1\times {\mathrm{2237}}^1$

素因数の和:2275

約数の個数: 48

約数和(自身を含む): 48877920

約数和(自身を除く): 27626420

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 190, 250, 380, 475, 500, 950, 1900, 2237, 2375, 4474, 4750, 8948, 9500, 11185, 22370, 42503, 44740, 55925, 85006, 111850, 170012, 212515, 223700, 279625, 425030, 559250, 850060, 1062575, 1118500, 2125150, 4250300, 5312875, 10625750, 21251500]

約数ペア:

[(1, 21251500), (2, 10625750), (4, 5312875), (5, 4250300), (10, 2125150), (19, 1118500), (20, 1062575), (25, 850060), (38, 559250), (50, 425030), (76, 279625), (95, 223700), (100, 212515), (125, 170012), (190, 111850), (250, 85006), (380, 55925), (475, 44740), (500, 42503), (950, 22370), (1900, 11185), (2237, 9500), (2375, 8948), (4474, 4750)]