21071648

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{37}}^3$

素因数の和:134

約数の個数: 48

約数和(自身を含む): 45916920

約数和(自身を除く): 24845272

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 37, 52, 74, 104, 148, 208, 296, 416, 481, 592, 962, 1184, 1369, 1924, 2738, 3848, 5476, 7696, 10952, 15392, 17797, 21904, 35594, 43808, 50653, 71188, 101306, 142376, 202612, 284752, 405224, 569504, 658489, 810448, 1316978, 1620896, 2633956, 5267912, 10535824, 21071648]

約数ペア:

[(1, 21071648), (2, 10535824), (4, 5267912), (8, 2633956), (13, 1620896), (16, 1316978), (26, 810448), (32, 658489), (37, 569504), (52, 405224), (74, 284752), (104, 202612), (148, 142376), (208, 101306), (296, 71188), (416, 50653), (481, 43808), (592, 35594), (962, 21904), (1184, 17797), (1369, 15392), (1924, 10952), (2738, 7696), (3848, 5476)]