20391105

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{27743}}^1$

素因数の和:27765

約数の個数: 24

約数和(自身を含む): 37953792

約数和(自身を除く): 17562687

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 27743, 83229, 138715, 194201, 416145, 582603, 971005, 1359407, 2913015, 4078221, 6797035, 20391105]

約数ペア:

[(1, 20391105), (3, 6797035), (5, 4078221), (7, 2913015), (15, 1359407), (21, 971005), (35, 582603), (49, 416145), (105, 194201), (147, 138715), (245, 83229), (735, 27743)]