21904630

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{421}}^1$

素因数の和:493

約数の個数: 48

約数和(自身を含む): 44451792

約数和(自身を除く): 22547162

約数列:

[1, 2, 5, 10, 11, 22, 43, 55, 86, 110, 121, 215, 242, 421, 430, 473, 605, 842, 946, 1210, 2105, 2365, 4210, 4631, 4730, 5203, 9262, 10406, 18103, 23155, 26015, 36206, 46310, 50941, 52030, 90515, 101882, 181030, 199133, 254705, 398266, 509410, 995665, 1991330, 2190463, 4380926, 10952315, 21904630]

約数ペア:

[(1, 21904630), (2, 10952315), (5, 4380926), (10, 2190463), (11, 1991330), (22, 995665), (43, 509410), (55, 398266), (86, 254705), (110, 199133), (121, 181030), (215, 101882), (242, 90515), (421, 52030), (430, 50941), (473, 46310), (605, 36206), (842, 26015), (946, 23155), (1210, 18103), (2105, 10406), (2365, 9262), (4210, 5203), (4631, 4730)]