20478080

素因数分解:

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

素因数の和:686

約数の個数: 96

約数和(自身を含む): 57035340

約数和(自身を除く): 36557260

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, 280, 320, 392, 448, 490, 560, 640, 653, 784, 896, 980, 1120, 1306, 1568, 1960, 2240, 2612, 3136, 3265, 3920, 4480, 4571, 5224, 6272, 6530, 7840, 9142, 10448, 13060, 15680, 18284, 20896, 22855, 26120, 31360, 31997, 36568, 41792, 45710, 52240, 63994, 73136, 83584, 91420, 104480, 127988, 146272, 159985, 182840, 208960, 255976, 292544, 319970, 365680, 417920, 511952, 585088, 639940, 731360, 1023904, 1279880, 1462720, 2047808, 2559760, 2925440, 4095616, 5119520, 10239040, 20478080]

約数ペア:

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