20861120

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:230

約数の個数: 112

約数和(自身を含む): 58033920

約数和(自身を除く): 37172800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 67, 70, 80, 112, 134, 139, 140, 160, 224, 268, 278, 280, 320, 335, 448, 469, 536, 556, 560, 670, 695, 938, 973, 1072, 1112, 1120, 1340, 1390, 1876, 1946, 2144, 2224, 2240, 2345, 2680, 2780, 3752, 3892, 4288, 4448, 4690, 4865, 5360, 5560, 7504, 7784, 8896, 9313, 9380, 9730, 10720, 11120, 15008, 15568, 18626, 18760, 19460, 21440, 22240, 30016, 31136, 37252, 37520, 38920, 44480, 46565, 62272, 65191, 74504, 75040, 77840, 93130, 130382, 149008, 150080, 155680, 186260, 260764, 298016, 311360, 325955, 372520, 521528, 596032, 651910, 745040, 1043056, 1303820, 1490080, 2086112, 2607640, 2980160, 4172224, 5215280, 10430560, 20861120]

約数ペア:

[(1, 20861120), (2, 10430560), (4, 5215280), (5, 4172224), (7, 2980160), (8, 2607640), (10, 2086112), (14, 1490080), (16, 1303820), (20, 1043056), (28, 745040), (32, 651910), (35, 596032), (40, 521528), (56, 372520), (64, 325955), (67, 311360), (70, 298016), (80, 260764), (112, 186260), (134, 155680), (139, 150080), (140, 149008), (160, 130382), (224, 93130), (268, 77840), (278, 75040), (280, 74504), (320, 65191), (335, 62272), (448, 46565), (469, 44480), (536, 38920), (556, 37520), (560, 37252), (670, 31136), (695, 30016), (938, 22240), (973, 21440), (1072, 19460), (1112, 18760), (1120, 18626), (1340, 15568), (1390, 15008), (1876, 11120), (1946, 10720), (2144, 9730), (2224, 9380), (2240, 9313), (2345, 8896), (2680, 7784), (2780, 7504), (3752, 5560), (3892, 5360), (4288, 4865), (4448, 4690)]