393711280

素因数分解:

$2^4\times 5^1\times {\mathrm{4921391}}^1$

素因数の和:4921404

約数の個数: 20

約数和(自身を含む): 915378912

約数和(自身を除く): 521667632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4921391, 9842782, 19685564, 24606955, 39371128, 49213910, 78742256, 98427820, 196855640, 393711280]

約数ペア:

[(1, 393711280), (2, 196855640), (4, 98427820), (5, 78742256), (8, 49213910), (10, 39371128), (16, 24606955), (20, 19685564), (40, 9842782), (80, 4921391)]