20387848

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 43464960

約数和(自身を除く): 23077112

約数列:

[1, 2, 4, 8, 13, 26, 43, 47, 52, 86, 94, 97, 104, 172, 188, 194, 344, 376, 388, 559, 611, 776, 1118, 1222, 1261, 2021, 2236, 2444, 2522, 4042, 4171, 4472, 4559, 4888, 5044, 8084, 8342, 9118, 10088, 16168, 16684, 18236, 26273, 33368, 36472, 52546, 54223, 59267, 105092, 108446, 118534, 196037, 210184, 216892, 237068, 392074, 433784, 474136, 784148, 1568296, 2548481, 5096962, 10193924, 20387848]

約数ペア:

[(1, 20387848), (2, 10193924), (4, 5096962), (8, 2548481), (13, 1568296), (26, 784148), (43, 474136), (47, 433784), (52, 392074), (86, 237068), (94, 216892), (97, 210184), (104, 196037), (172, 118534), (188, 108446), (194, 105092), (344, 59267), (376, 54223), (388, 52546), (559, 36472), (611, 33368), (776, 26273), (1118, 18236), (1222, 16684), (1261, 16168), (2021, 10088), (2236, 9118), (2444, 8342), (2522, 8084), (4042, 5044), (4171, 4888), (4472, 4559)]