990640138

素因数分解:

$2^1\times {\mathrm{71}}^1\times {\mathrm{353}}^1\times {\mathrm{19763}}^1$

素因数の和:20189

約数の個数: 16

約数和(自身を含む): 1511234496

約数和(自身を除く): 520594358

約数列:

[1, 2, 71, 142, 353, 706, 19763, 25063, 39526, 50126, 1403173, 2806346, 6976339, 13952678, 495320069, 990640138]

約数ペア:

[(1, 990640138), (2, 495320069), (71, 13952678), (142, 6976339), (353, 2806346), (706, 1403173), (19763, 50126), (25063, 39526)]