820173020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1000211}}^1$

素因数の和:1000261

約数の個数: 24

約数和(自身を含む): 1764373968

約数和(自身を除く): 944200948

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1000211, 2000422, 4000844, 5001055, 10002110, 20004220, 41008651, 82017302, 164034604, 205043255, 410086510, 820173020]

約数ペア:

[(1, 820173020), (2, 410086510), (4, 205043255), (5, 164034604), (10, 82017302), (20, 41008651), (41, 20004220), (82, 10002110), (164, 5001055), (205, 4000844), (410, 2000422), (820, 1000211)]