81492920

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{14657}}^1$

素因数の和:14807

約数の個数: 32

約数和(自身を含む): 184690800

約数和(自身を除く): 103197880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 5560, 14657, 29314, 58628, 73285, 117256, 146570, 293140, 586280, 2037323, 4074646, 8149292, 10186615, 16298584, 20373230, 40746460, 81492920]

約数ペア:

[(1, 81492920), (2, 40746460), (4, 20373230), (5, 16298584), (8, 10186615), (10, 8149292), (20, 4074646), (40, 2037323), (139, 586280), (278, 293140), (556, 146570), (695, 117256), (1112, 73285), (1390, 58628), (2780, 29314), (5560, 14657)]