399293872

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{6521}}^1$

素因数の和:6661

約数の個数: 40

約数和(自身を含む): 800640720

約数和(自身を除く): 401346848

約数列:

[1, 2, 4, 8, 16, 43, 86, 89, 172, 178, 344, 356, 688, 712, 1424, 3827, 6521, 7654, 13042, 15308, 26084, 30616, 52168, 61232, 104336, 280403, 560806, 580369, 1121612, 1160738, 2243224, 2321476, 4486448, 4642952, 9285904, 24955867, 49911734, 99823468, 199646936, 399293872]

約数ペア:

[(1, 399293872), (2, 199646936), (4, 99823468), (8, 49911734), (16, 24955867), (43, 9285904), (86, 4642952), (89, 4486448), (172, 2321476), (178, 2243224), (344, 1160738), (356, 1121612), (688, 580369), (712, 560806), (1424, 280403), (3827, 104336), (6521, 61232), (7654, 52168), (13042, 30616), (15308, 26084)]