81912320

素因数分解:

$2^9\times 5^1\times 7^2\times {\mathrm{653}}^1$

素因数の和:690

約数の個数: 120

約数和(自身を含む): 228812364

約数和(自身を除く): 146900044

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, 512, 560, 640, 653, 784, 896, 980, 1120, 1280, 1306, 1568, 1792, 1960, 2240, 2560, 2612, 3136, 3265, 3584, 3920, 4480, 4571, 5224, 6272, 6530, 7840, 8960, 9142, 10448, 12544, 13060, 15680, 17920, 18284, 20896, 22855, 25088, 26120, 31360, 31997, 36568, 41792, 45710, 52240, 62720, 63994, 73136, 83584, 91420, 104480, 125440, 127988, 146272, 159985, 167168, 182840, 208960, 255976, 292544, 319970, 334336, 365680, 417920, 511952, 585088, 639940, 731360, 835840, 1023904, 1170176, 1279880, 1462720, 1671680, 2047808, 2340352, 2559760, 2925440, 4095616, 5119520, 5850880, 8191232, 10239040, 11701760, 16382464, 20478080, 40956160, 81912320]

約数ペア:

[(1, 81912320), (2, 40956160), (4, 20478080), (5, 16382464), (7, 11701760), (8, 10239040), (10, 8191232), (14, 5850880), (16, 5119520), (20, 4095616), (28, 2925440), (32, 2559760), (35, 2340352), (40, 2047808), (49, 1671680), (56, 1462720), (64, 1279880), (70, 1170176), (80, 1023904), (98, 835840), (112, 731360), (128, 639940), (140, 585088), (160, 511952), (196, 417920), (224, 365680), (245, 334336), (256, 319970), (280, 292544), (320, 255976), (392, 208960), (448, 182840), (490, 167168), (512, 159985), (560, 146272), (640, 127988), (653, 125440), (784, 104480), (896, 91420), (980, 83584), (1120, 73136), (1280, 63994), (1306, 62720), (1568, 52240), (1792, 45710), (1960, 41792), (2240, 36568), (2560, 31997), (2612, 31360), (3136, 26120), (3265, 25088), (3584, 22855), (3920, 20896), (4480, 18284), (4571, 17920), (5224, 15680), (6272, 13060), (6530, 12544), (7840, 10448), (8960, 9142)]