20290664

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:473

約数の個数: 32

約数和(自身を含む): 39009600

約数和(自身を除く): 18718936

約数列:

[1, 2, 4, 8, 71, 139, 142, 257, 278, 284, 514, 556, 568, 1028, 1112, 2056, 9869, 18247, 19738, 35723, 36494, 39476, 71446, 72988, 78952, 142892, 145976, 285784, 2536333, 5072666, 10145332, 20290664]

約数ペア:

[(1, 20290664), (2, 10145332), (4, 5072666), (8, 2536333), (71, 285784), (139, 145976), (142, 142892), (257, 78952), (278, 72988), (284, 71446), (514, 39476), (556, 36494), (568, 35723), (1028, 19738), (1112, 18247), (2056, 9869)]