640912

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{977}}^1$

素因数の和:1026

約数の個数: 20

約数和(自身を含む): 1273356

約数和(自身を除く): 632444

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 977, 1954, 3908, 7816, 15632, 40057, 80114, 160228, 320456, 640912]

約数ペア:

[(1, 640912), (2, 320456), (4, 160228), (8, 80114), (16, 40057), (41, 15632), (82, 7816), (164, 3908), (328, 1954), (656, 977)]