21020265

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9533}}^1$

素因数の和:9558

約数の個数: 36

約数和(自身を含む): 42388164

約数和(自身を除く): 21367899

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9533, 28599, 47665, 66731, 85797, 142995, 200193, 333655, 428985, 467117, 600579, 1000965, 1401351, 2335585, 3002895, 4204053, 7006755, 21020265]

約数ペア:

[(1, 21020265), (3, 7006755), (5, 4204053), (7, 3002895), (9, 2335585), (15, 1401351), (21, 1000965), (35, 600579), (45, 467117), (49, 428985), (63, 333655), (105, 200193), (147, 142995), (245, 85797), (315, 66731), (441, 47665), (735, 28599), (2205, 9533)]