20479744

素因数分解:

$2^8\times {\mathrm{79999}}^1$

素因数の和:80015

約数の個数: 18

約数和(自身を含む): 40880000

約数和(自身を除く): 20400256

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 79999, 159998, 319996, 639992, 1279984, 2559968, 5119936, 10239872, 20479744]

約数ペア:

[(1, 20479744), (2, 10239872), (4, 5119936), (8, 2559968), (16, 1279984), (32, 639992), (64, 319996), (128, 159998), (256, 79999)]