21364760

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6761}}^1$

素因数の和:6851

約数の個数: 32

約数和(自身を含む): 48686400

約数和(自身を除く): 27321640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6761, 13522, 27044, 33805, 54088, 67610, 135220, 270440, 534119, 1068238, 2136476, 2670595, 4272952, 5341190, 10682380, 21364760]

約数ペア:

[(1, 21364760), (2, 10682380), (4, 5341190), (5, 4272952), (8, 2670595), (10, 2136476), (20, 1068238), (40, 534119), (79, 270440), (158, 135220), (316, 67610), (395, 54088), (632, 33805), (790, 27044), (1580, 13522), (3160, 6761)]