20806065920

素因数分解:

$2^8\times 5^1\times {\mathrm{103}}^1\times {\mathrm{157813}}^1$

素因数の和:157937

約数の個数: 72

約数和(自身を含む): 50321203296

約数和(自身を除く): 29515137376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 128, 160, 206, 256, 320, 412, 515, 640, 824, 1030, 1280, 1648, 2060, 3296, 4120, 6592, 8240, 13184, 16480, 26368, 32960, 65920, 131840, 157813, 315626, 631252, 789065, 1262504, 1578130, 2525008, 3156260, 5050016, 6312520, 10100032, 12625040, 16254739, 20200064, 25250080, 32509478, 40400128, 50500160, 65018956, 81273695, 101000320, 130037912, 162547390, 202000640, 260075824, 325094780, 520151648, 650189560, 1040303296, 1300379120, 2080606592, 2600758240, 4161213184, 5201516480, 10403032960, 20806065920]

約数ペア:

[(1, 20806065920), (2, 10403032960), (4, 5201516480), (5, 4161213184), (8, 2600758240), (10, 2080606592), (16, 1300379120), (20, 1040303296), (32, 650189560), (40, 520151648), (64, 325094780), (80, 260075824), (103, 202000640), (128, 162547390), (160, 130037912), (206, 101000320), (256, 81273695), (320, 65018956), (412, 50500160), (515, 40400128), (640, 32509478), (824, 25250080), (1030, 20200064), (1280, 16254739), (1648, 12625040), (2060, 10100032), (3296, 6312520), (4120, 5050016), (6592, 3156260), (8240, 2525008), (13184, 1578130), (16480, 1262504), (26368, 789065), (32960, 631252), (65920, 315626), (131840, 157813)]