20972895

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:152

約数の個数: 64

約数和(自身を含む): 37822464

約数和(自身を除く): 16849569

約数列:

[1, 3, 5, 15, 23, 31, 37, 53, 69, 93, 111, 115, 155, 159, 185, 265, 345, 465, 555, 713, 795, 851, 1147, 1219, 1643, 1961, 2139, 2553, 3441, 3565, 3657, 4255, 4929, 5735, 5883, 6095, 8215, 9805, 10695, 12765, 17205, 18285, 24645, 26381, 29415, 37789, 45103, 60791, 79143, 113367, 131905, 135309, 182373, 188945, 225515, 303955, 395715, 566835, 676545, 911865, 1398193, 4194579, 6990965, 20972895]

約数ペア:

[(1, 20972895), (3, 6990965), (5, 4194579), (15, 1398193), (23, 911865), (31, 676545), (37, 566835), (53, 395715), (69, 303955), (93, 225515), (111, 188945), (115, 182373), (155, 135309), (159, 131905), (185, 113367), (265, 79143), (345, 60791), (465, 45103), (555, 37789), (713, 29415), (795, 26381), (851, 24645), (1147, 18285), (1219, 17205), (1643, 12765), (1961, 10695), (2139, 9805), (2553, 8215), (3441, 6095), (3565, 5883), (3657, 5735), (4255, 4929)]