20872240

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1877}}^1$

素因数の和:2029

約数の個数: 40

約数和(自身を含む): 48903120

約数和(自身を除く): 28030880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 1877, 2224, 2780, 3754, 5560, 7508, 9385, 11120, 15016, 18770, 30032, 37540, 75080, 150160, 260903, 521806, 1043612, 1304515, 2087224, 2609030, 4174448, 5218060, 10436120, 20872240]

約数ペア:

[(1, 20872240), (2, 10436120), (4, 5218060), (5, 4174448), (8, 2609030), (10, 2087224), (16, 1304515), (20, 1043612), (40, 521806), (80, 260903), (139, 150160), (278, 75080), (556, 37540), (695, 30032), (1112, 18770), (1390, 15016), (1877, 11120), (2224, 9385), (2780, 7508), (3754, 5560)]