20937945

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{467}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 39693888

約数和(自身を除く): 18755943

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 61, 105, 147, 183, 245, 305, 427, 467, 735, 915, 1281, 1401, 2135, 2335, 2989, 3269, 6405, 7005, 8967, 9807, 14945, 16345, 22883, 28487, 44835, 49035, 68649, 85461, 114415, 142435, 199409, 343245, 427305, 598227, 997045, 1395863, 2991135, 4187589, 6979315, 20937945]

約数ペア:

[(1, 20937945), (3, 6979315), (5, 4187589), (7, 2991135), (15, 1395863), (21, 997045), (35, 598227), (49, 427305), (61, 343245), (105, 199409), (147, 142435), (183, 114415), (245, 85461), (305, 68649), (427, 49035), (467, 44835), (735, 28487), (915, 22883), (1281, 16345), (1401, 14945), (2135, 9807), (2335, 8967), (2989, 7005), (3269, 6405)]