20965424

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{983}}^1$

素因数の和:1065

約数の個数: 40

約数和(自身を含む): 42949632

約数和(自身を除く): 21984208

約数列:

[1, 2, 4, 8, 16, 31, 43, 62, 86, 124, 172, 248, 344, 496, 688, 983, 1333, 1966, 2666, 3932, 5332, 7864, 10664, 15728, 21328, 30473, 42269, 60946, 84538, 121892, 169076, 243784, 338152, 487568, 676304, 1310339, 2620678, 5241356, 10482712, 20965424]

約数ペア:

[(1, 20965424), (2, 10482712), (4, 5241356), (8, 2620678), (16, 1310339), (31, 676304), (43, 487568), (62, 338152), (86, 243784), (124, 169076), (172, 121892), (248, 84538), (344, 60946), (496, 42269), (688, 30473), (983, 21328), (1333, 15728), (1966, 10664), (2666, 7864), (3932, 5332)]