78541640

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{19441}}^1$

素因数の和:19553

約数の個数: 32

約数和(自身を含む): 178477560

約数和(自身を除く): 99935920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 19441, 38882, 77764, 97205, 155528, 194410, 388820, 777640, 1963541, 3927082, 7854164, 9817705, 15708328, 19635410, 39270820, 78541640]

約数ペア:

[(1, 78541640), (2, 39270820), (4, 19635410), (5, 15708328), (8, 9817705), (10, 7854164), (20, 3927082), (40, 1963541), (101, 777640), (202, 388820), (404, 194410), (505, 155528), (808, 97205), (1010, 77764), (2020, 38882), (4040, 19441)]