20086520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:408

約数の個数: 64

約数和(自身を含む): 48470400

約数和(自身を除く): 28383880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 109, 136, 170, 218, 271, 340, 436, 542, 545, 680, 872, 1084, 1090, 1355, 1853, 2168, 2180, 2710, 3706, 4360, 4607, 5420, 7412, 9214, 9265, 10840, 14824, 18428, 18530, 23035, 29539, 36856, 37060, 46070, 59078, 74120, 92140, 118156, 147695, 184280, 236312, 295390, 502163, 590780, 1004326, 1181560, 2008652, 2510815, 4017304, 5021630, 10043260, 20086520]

約数ペア:

[(1, 20086520), (2, 10043260), (4, 5021630), (5, 4017304), (8, 2510815), (10, 2008652), (17, 1181560), (20, 1004326), (34, 590780), (40, 502163), (68, 295390), (85, 236312), (109, 184280), (136, 147695), (170, 118156), (218, 92140), (271, 74120), (340, 59078), (436, 46070), (542, 37060), (545, 36856), (680, 29539), (872, 23035), (1084, 18530), (1090, 18428), (1355, 14824), (1853, 10840), (2168, 9265), (2180, 9214), (2710, 7412), (3706, 5420), (4360, 4607)]