19978576

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{65719}}^1$

素因数の和:65746

約数の個数: 20

約数和(自身を含む): 40746400

約数和(自身を除く): 20767824

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 65719, 131438, 262876, 525752, 1051504, 1248661, 2497322, 4994644, 9989288, 19978576]

約数ペア:

[(1, 19978576), (2, 9989288), (4, 4994644), (8, 2497322), (16, 1248661), (19, 1051504), (38, 525752), (76, 262876), (152, 131438), (304, 65719)]