21078772

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{857}}^1$

素因数の和:928

約数の個数: 48

約数和(自身を含む): 44396352

約数和(自身を除く): 23317580

約数列:

[1, 2, 4, 11, 13, 22, 26, 43, 44, 52, 86, 143, 172, 286, 473, 559, 572, 857, 946, 1118, 1714, 1892, 2236, 3428, 6149, 9427, 11141, 12298, 18854, 22282, 24596, 36851, 37708, 44564, 73702, 122551, 147404, 245102, 405361, 479063, 490204, 810722, 958126, 1621444, 1916252, 5269693, 10539386, 21078772]

約数ペア:

[(1, 21078772), (2, 10539386), (4, 5269693), (11, 1916252), (13, 1621444), (22, 958126), (26, 810722), (43, 490204), (44, 479063), (52, 405361), (86, 245102), (143, 147404), (172, 122551), (286, 73702), (473, 44564), (559, 37708), (572, 36851), (857, 24596), (946, 22282), (1118, 18854), (1714, 12298), (1892, 11141), (2236, 9427), (3428, 6149)]