19980896

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1117}}^1$

素因数の和:1183

約数の個数: 48

約数和(自身を含む): 43387344

約数和(自身を除く): 23406448

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 86, 104, 172, 208, 344, 416, 559, 688, 1117, 1118, 1376, 2234, 2236, 4468, 4472, 8936, 8944, 14521, 17872, 17888, 29042, 35744, 48031, 58084, 96062, 116168, 192124, 232336, 384248, 464672, 624403, 768496, 1248806, 1536992, 2497612, 4995224, 9990448, 19980896]

約数ペア:

[(1, 19980896), (2, 9990448), (4, 4995224), (8, 2497612), (13, 1536992), (16, 1248806), (26, 768496), (32, 624403), (43, 464672), (52, 384248), (86, 232336), (104, 192124), (172, 116168), (208, 96062), (344, 58084), (416, 48031), (559, 35744), (688, 29042), (1117, 17888), (1118, 17872), (1376, 14521), (2234, 8944), (2236, 8936), (4468, 4472)]