20914509

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{2447}}^1$

素因数の和:2505

約数の個数: 32

約数和(自身を含む): 35721216

約数和(自身を除く): 14806707

約数列:

[1, 3, 7, 11, 21, 33, 37, 77, 111, 231, 259, 407, 777, 1221, 2447, 2849, 7341, 8547, 17129, 26917, 51387, 80751, 90539, 188419, 271617, 565257, 633773, 995929, 1901319, 2987787, 6971503, 20914509]

約数ペア:

[(1, 20914509), (3, 6971503), (7, 2987787), (11, 1901319), (21, 995929), (33, 633773), (37, 565257), (77, 271617), (111, 188419), (231, 90539), (259, 80751), (407, 51387), (777, 26917), (1221, 17129), (2447, 8547), (2849, 7341)]