256587520

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{4091}}^1$

素因数の和:4126

約数の個数: 108

約数和(自身を含む): 715126104

約数和(自身を除く): 458538584

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 256, 280, 320, 392, 448, 490, 560, 640, 784, 896, 980, 1120, 1280, 1568, 1792, 1960, 2240, 3136, 3920, 4091, 4480, 6272, 7840, 8182, 8960, 12544, 15680, 16364, 20455, 28637, 31360, 32728, 40910, 57274, 62720, 65456, 81820, 114548, 130912, 143185, 163640, 200459, 229096, 261824, 286370, 327280, 400918, 458192, 523648, 572740, 654560, 801836, 916384, 1002295, 1047296, 1145480, 1309120, 1603672, 1832768, 2004590, 2290960, 2618240, 3207344, 3665536, 4009180, 4581920, 5236480, 6414688, 7331072, 8018360, 9163840, 12829376, 16036720, 18327680, 25658752, 32073440, 36655360, 51317504, 64146880, 128293760, 256587520]

約数ペア:

[(1, 256587520), (2, 128293760), (4, 64146880), (5, 51317504), (7, 36655360), (8, 32073440), (10, 25658752), (14, 18327680), (16, 16036720), (20, 12829376), (28, 9163840), (32, 8018360), (35, 7331072), (40, 6414688), (49, 5236480), (56, 4581920), (64, 4009180), (70, 3665536), (80, 3207344), (98, 2618240), (112, 2290960), (128, 2004590), (140, 1832768), (160, 1603672), (196, 1309120), (224, 1145480), (245, 1047296), (256, 1002295), (280, 916384), (320, 801836), (392, 654560), (448, 572740), (490, 523648), (560, 458192), (640, 400918), (784, 327280), (896, 286370), (980, 261824), (1120, 229096), (1280, 200459), (1568, 163640), (1792, 143185), (1960, 130912), (2240, 114548), (3136, 81820), (3920, 65456), (4091, 62720), (4480, 57274), (6272, 40910), (7840, 32728), (8182, 31360), (8960, 28637), (12544, 20455), (15680, 16364)]