21189910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{263}}^1\times {\mathrm{1151}}^1$

素因数の和:1428

約数の個数: 32

約数和(自身を含む): 43794432

約数和(自身を除く): 22604522

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 263, 526, 1151, 1315, 1841, 2302, 2630, 3682, 5755, 8057, 9205, 11510, 16114, 18410, 40285, 80570, 302713, 605426, 1513565, 2118991, 3027130, 4237982, 10594955, 21189910]

約数ペア:

[(1, 21189910), (2, 10594955), (5, 4237982), (7, 3027130), (10, 2118991), (14, 1513565), (35, 605426), (70, 302713), (263, 80570), (526, 40285), (1151, 18410), (1315, 16114), (1841, 11510), (2302, 9205), (2630, 8057), (3682, 5755)]