21649210

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:283

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 23969990

約数列:

[1, 2, 5, 10, 11, 22, 23, 43, 46, 55, 86, 110, 115, 199, 215, 230, 253, 398, 430, 473, 506, 946, 989, 995, 1265, 1978, 1990, 2189, 2365, 2530, 4378, 4577, 4730, 4945, 8557, 9154, 9890, 10879, 10945, 17114, 21758, 21890, 22885, 42785, 45770, 50347, 54395, 85570, 94127, 100694, 108790, 188254, 196811, 251735, 393622, 470635, 503470, 941270, 984055, 1968110, 2164921, 4329842, 10824605, 21649210]

約数ペア:

[(1, 21649210), (2, 10824605), (5, 4329842), (10, 2164921), (11, 1968110), (22, 984055), (23, 941270), (43, 503470), (46, 470635), (55, 393622), (86, 251735), (110, 196811), (115, 188254), (199, 108790), (215, 100694), (230, 94127), (253, 85570), (398, 54395), (430, 50347), (473, 45770), (506, 42785), (946, 22885), (989, 21890), (995, 21758), (1265, 17114), (1978, 10945), (1990, 10879), (2189, 9890), (2365, 9154), (2530, 8557), (4378, 4945), (4577, 4730)]