18991804

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{9871}}^1$

素因数の和:9925

約数の個数: 24

約数和(自身を含む): 36763328

約数和(自身を除く): 17771524

約数列:

[1, 2, 4, 13, 26, 37, 52, 74, 148, 481, 962, 1924, 9871, 19742, 39484, 128323, 256646, 365227, 513292, 730454, 1460908, 4747951, 9495902, 18991804]

約数ペア:

[(1, 18991804), (2, 9495902), (4, 4747951), (13, 1460908), (26, 730454), (37, 513292), (52, 365227), (74, 256646), (148, 128323), (481, 39484), (962, 19742), (1924, 9871)]