820123280

素因数分解:

$2^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{67891}}^1$

素因数の和:68055

約数の個数: 40

約数和(自身を含む): 1919442624

約数和(自身を除く): 1099319344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 151, 302, 604, 755, 1208, 1510, 2416, 3020, 6040, 12080, 67891, 135782, 271564, 339455, 543128, 678910, 1086256, 1357820, 2715640, 5431280, 10251541, 20503082, 41006164, 51257705, 82012328, 102515410, 164024656, 205030820, 410061640, 820123280]

約数ペア:

[(1, 820123280), (2, 410061640), (4, 205030820), (5, 164024656), (8, 102515410), (10, 82012328), (16, 51257705), (20, 41006164), (40, 20503082), (80, 10251541), (151, 5431280), (302, 2715640), (604, 1357820), (755, 1086256), (1208, 678910), (1510, 543128), (2416, 339455), (3020, 271564), (6040, 135782), (12080, 67891)]