20707120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{359}}^1$

素因数の和:482

約数の個数: 80

約数和(自身を含む): 55710720

約数和(自身を除く): 35003600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 103, 112, 140, 206, 280, 359, 412, 515, 560, 718, 721, 824, 1030, 1436, 1442, 1648, 1795, 2060, 2513, 2872, 2884, 3590, 3605, 4120, 5026, 5744, 5768, 7180, 7210, 8240, 10052, 11536, 12565, 14360, 14420, 20104, 25130, 28720, 28840, 36977, 40208, 50260, 57680, 73954, 100520, 147908, 184885, 201040, 258839, 295816, 369770, 517678, 591632, 739540, 1035356, 1294195, 1479080, 2070712, 2588390, 2958160, 4141424, 5176780, 10353560, 20707120]

約数ペア:

[(1, 20707120), (2, 10353560), (4, 5176780), (5, 4141424), (7, 2958160), (8, 2588390), (10, 2070712), (14, 1479080), (16, 1294195), (20, 1035356), (28, 739540), (35, 591632), (40, 517678), (56, 369770), (70, 295816), (80, 258839), (103, 201040), (112, 184885), (140, 147908), (206, 100520), (280, 73954), (359, 57680), (412, 50260), (515, 40208), (560, 36977), (718, 28840), (721, 28720), (824, 25130), (1030, 20104), (1436, 14420), (1442, 14360), (1648, 12565), (1795, 11536), (2060, 10052), (2513, 8240), (2872, 7210), (2884, 7180), (3590, 5768), (3605, 5744), (4120, 5026)]