255217557

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{7187}}^1$

素因数の和:7305

約数の個数: 32

約数和(自身を含む): 414028800

約数和(自身を除く): 158811243

約数列:

[1, 3, 7, 19, 21, 57, 89, 133, 267, 399, 623, 1691, 1869, 5073, 7187, 11837, 21561, 35511, 50309, 136553, 150927, 409659, 639643, 955871, 1918929, 2867613, 4477501, 12153217, 13432503, 36459651, 85072519, 255217557]

約数ペア:

[(1, 255217557), (3, 85072519), (7, 36459651), (19, 13432503), (21, 12153217), (57, 4477501), (89, 2867613), (133, 1918929), (267, 955871), (399, 639643), (623, 409659), (1691, 150927), (1869, 136553), (5073, 50309), (7187, 35511), (11837, 21561)]