19955456

素因数分解:

$2^8\times {\mathrm{77951}}^1$

素因数の和:77967

約数の個数: 18

約数和(自身を含む): 39833472

約数和(自身を除く): 19878016

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 77951, 155902, 311804, 623608, 1247216, 2494432, 4988864, 9977728, 19955456]

約数ペア:

[(1, 19955456), (2, 9977728), (4, 4988864), (8, 2494432), (16, 1247216), (32, 623608), (64, 311804), (128, 155902), (256, 77951)]