20278160

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{739}}^1$

素因数の和:773

約数の個数: 80

約数和(自身を含む): 55056000

約数和(自身を除く): 34777840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 739, 784, 980, 1372, 1478, 1715, 1960, 2744, 2956, 3430, 3695, 3920, 5173, 5488, 5912, 6860, 7390, 10346, 11824, 13720, 14780, 20692, 25865, 27440, 29560, 36211, 41384, 51730, 59120, 72422, 82768, 103460, 144844, 181055, 206920, 253477, 289688, 362110, 413840, 506954, 579376, 724220, 1013908, 1267385, 1448440, 2027816, 2534770, 2896880, 4055632, 5069540, 10139080, 20278160]

約数ペア:

[(1, 20278160), (2, 10139080), (4, 5069540), (5, 4055632), (7, 2896880), (8, 2534770), (10, 2027816), (14, 1448440), (16, 1267385), (20, 1013908), (28, 724220), (35, 579376), (40, 506954), (49, 413840), (56, 362110), (70, 289688), (80, 253477), (98, 206920), (112, 181055), (140, 144844), (196, 103460), (245, 82768), (280, 72422), (343, 59120), (392, 51730), (490, 41384), (560, 36211), (686, 29560), (739, 27440), (784, 25865), (980, 20692), (1372, 14780), (1478, 13720), (1715, 11824), (1960, 10346), (2744, 7390), (2956, 6860), (3430, 5912), (3695, 5488), (3920, 5173)]