641552

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{397}}^1$

素因数の和:506

約数の個数: 20

約数和(自身を含む): 1258476

約数和(自身を除く): 616924

約数列:

[1, 2, 4, 8, 16, 101, 202, 397, 404, 794, 808, 1588, 1616, 3176, 6352, 40097, 80194, 160388, 320776, 641552]

約数ペア:

[(1, 641552), (2, 320776), (4, 160388), (8, 80194), (16, 40097), (101, 6352), (202, 3176), (397, 1616), (404, 1588), (794, 808)]