20927205

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{431}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18699291

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 83, 117, 195, 249, 415, 431, 585, 747, 1079, 1245, 1293, 2155, 3237, 3735, 3879, 5395, 5603, 6465, 9711, 16185, 16809, 19395, 28015, 35773, 48555, 50427, 84045, 107319, 178865, 252135, 321957, 465049, 536595, 1395147, 1609785, 2325245, 4185441, 6975735, 20927205]

約数ペア:

[(1, 20927205), (3, 6975735), (5, 4185441), (9, 2325245), (13, 1609785), (15, 1395147), (39, 536595), (45, 465049), (65, 321957), (83, 252135), (117, 178865), (195, 107319), (249, 84045), (415, 50427), (431, 48555), (585, 35773), (747, 28015), (1079, 19395), (1245, 16809), (1293, 16185), (2155, 9711), (3237, 6465), (3735, 5603), (3879, 5395)]