28208985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:242

約数の個数: 64

約数和(自身を含む): 54369792

約数和(自身を除く): 26160807

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 53, 105, 111, 137, 159, 185, 259, 265, 371, 411, 555, 685, 777, 795, 959, 1113, 1295, 1855, 1961, 2055, 2877, 3885, 4795, 5069, 5565, 5883, 7261, 9805, 13727, 14385, 15207, 21783, 25345, 29415, 35483, 36305, 41181, 50827, 68635, 76035, 106449, 108915, 152481, 177415, 205905, 254135, 268657, 532245, 762405, 805971, 1343285, 1880599, 4029855, 5641797, 9402995, 28208985]

約数ペア:

[(1, 28208985), (3, 9402995), (5, 5641797), (7, 4029855), (15, 1880599), (21, 1343285), (35, 805971), (37, 762405), (53, 532245), (105, 268657), (111, 254135), (137, 205905), (159, 177415), (185, 152481), (259, 108915), (265, 106449), (371, 76035), (411, 68635), (555, 50827), (685, 41181), (777, 36305), (795, 35483), (959, 29415), (1113, 25345), (1295, 21783), (1855, 15207), (1961, 14385), (2055, 13727), (2877, 9805), (3885, 7261), (4795, 5883), (5069, 5565)]