20581715

素因数分解:

$5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{1091}}^1$

素因数の和:1128

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10867885

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 343, 385, 539, 1091, 1715, 2695, 3773, 5455, 7637, 12001, 18865, 38185, 53459, 60005, 84007, 267295, 374213, 420035, 588049, 1871065, 2940245, 4116343, 20581715]

約数ペア:

[(1, 20581715), (5, 4116343), (7, 2940245), (11, 1871065), (35, 588049), (49, 420035), (55, 374213), (77, 267295), (245, 84007), (343, 60005), (385, 53459), (539, 38185), (1091, 18865), (1715, 12001), (2695, 7637), (3773, 5455)]