20654955

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4211}}^1$

素因数の和:4331

約数の個数: 24

約数和(自身を含む): 36138960

約数和(自身を除く): 15484005

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4211, 4905, 12633, 21055, 37899, 63165, 189495, 458999, 1376997, 2294995, 4130991, 6884985, 20654955]

約数ペア:

[(1, 20654955), (3, 6884985), (5, 4130991), (9, 2294995), (15, 1376997), (45, 458999), (109, 189495), (327, 63165), (545, 37899), (981, 21055), (1635, 12633), (4211, 4905)]